Why is vaccination important?
Vaccination is a safe and effective way to prevent disease and save lives – now more than ever. Today there are vaccines available to protect against at least 20 diseases, such as diphtheria, tetanus, pertussis, influenza and measles. Together, these vaccines save the lives of up to 3 million people every year.
When we get vaccinated, we aren’t just protecting ourselves, but also those around us. Some people, like those who are seriously ill, are advised not to get certain vaccines – so they depend on the rest of us to get vaccinated and help reduce the spread of disease.
During the COVID-19 pandemic, vaccination continues to be critically important. The pandemic has caused a decline in the number of children receiving routine immunizations, which could lead to an increase in illness and death from preventable diseases. WHO has urged countries to ensure that essential immunization and health services continue, despite the challenges posed by COVID-19.More information about the importance of vaccines is available here.
How does a vaccine work?
Vaccines reduce risks of getting a disease by working with your body’s natural defenses to build protection. When you get a vaccine, your immune system responds. It:
- Recognizes the invading germ, such as the virus or bacteria.
- Produces antibodies. Antibodies are proteins produced naturally by the immune system to fight disease.
- Remembers the disease and how to fight it. If you are then exposed to the germ in the future, your immune system can quickly destroy it before you become unwell.
The vaccine is therefore a safe and clever way to produce an immune response in the body, without causing illness.
Our immune systems are designed to remember. Once exposed to one or more doses of a vaccine, we typically remain protected against a disease for years, decades or even a lifetime. This is what makes vaccines so effective. Rather than treating a disease after it occurs, vaccines prevent us in the first instance from getting sick.
How do vaccines protect individuals and communities?
Vaccines work by training and preparing the body’s natural defences – the immune system – to recognize and fight off viruses and bacteria. If the body is exposed to those disease-causing pathogens later, it will be ready to destroy them quickly – which prevents illness.
When a person gets vaccinated against a disease, their risk of infection is also reduced – so they’re also less likely to transmit the virus or bacteria to others. As more people in a community get vaccinated, fewer people remain vulnerable, and there is less possibility for an infected person to pass the pathogen on to another person. Lowering the possibility for a pathogen to circulate in the community protects those who cannot be vaccinated (due to health conditions, like allergies, or their age) from the disease targeted by the vaccine.
‘Herd immunity’, also known as ‘population immunity’, is the indirect protection from an infectious disease that happens when immunity develops in a population either through vaccination or through previous infection. Herd immunity does not mean unvaccinated or individuals who have not previously been infected are themselves immune. Instead, herd immunity exists when individuals who are not immune, but live in a community with a high proportion of immunity, have a reduced risk of disease as compared to non-immune individuals living in a community with a small proportion of immunity.
In communities with high immunity, the non-immune people have a lower risk of disease than they otherwise would, but their reduced risk results from the immunity of people in the community in which they are living (i.e. herd immunity) not because they are personally immune. Even after herd immunity is first reached and a reduced risk of disease among unimmunized people is observed, this risk will keep falling if vaccination coverage continues to increase. When vaccine coverage is very high, the risk of disease among those who are non-immune can become similar to those who are truly immune.
WHO supports achieving ‘herd immunity’ through vaccination, not by allowing a disease to spread through a population, as this would result in unnecessary cases and deaths.
For COVID-19, a new disease causing a global pandemic, many vaccines are in development and some are in the early phase of rollout, having demonstrated safety and efficacy against disease. The proportion of the population that must be vaccinated against COVID-19 to begin inducing herd immunity is not known. This is an important area of research and will likely vary according to the community, the vaccine, the populations prioritized for vaccination, and other factors.
Herd immunity is an important attribute of vaccines against polio, rotavirus, pneumococcus, Haemophilus influenzae type B, yellow fever, meningococcus and numerous other vaccine preventable diseases. Yet it is an approach that only works for vaccine-preventable diseases with an element of person-to-person spread. For example, tetanus is caught from bacteria in the environment, not from other people, so those who are unimmunized are not protected from the disease even if most of the rest of the community is vaccinated.
Why should I get vaccinated?
Without vaccines, we are at risk of serious illness and disability from diseases like measles, meningitis, pneumonia, tetanus and polio. Many of these diseases can be life-threatening. WHO estimates that vaccines save between 2 and 3 million lives every year.
Although some diseases may have become uncommon, the germs that cause them continue to circulate in some or all parts of the world. In today’s world, infectious diseases can easily cross borders, and infect anyone who is not protected
Two key reasons to get vaccinated are to protect ourselves and to protect those around us. Because not everyone can be vaccinated – including very young babies, those who are seriously ill or have certain allergies – they depend on others being vaccinated to ensure they are also safe from vaccine-preventable diseases.
What diseases do vaccines prevent?
Vaccines protect against many different diseases, including:
- Cervical cancer
- Hepatitis B
- Japanese encephalitis
- Yellow fever
Some other vaccines are currently under development or being piloted, including those that protect against Ebola or malaria, but are not yet widely available globally.
Not all of these vaccinations may be needed in your country. Some may only be given prior to travel, in areas of risk, or to people in high-risk occupations. Talk to your healthcare worker to find out what vaccinations are needed for you and your family.
Should my daughter get vaccinated against human papillomavirus (HPV)?
Virtually all cervical cancer cases start with a sexually transmitted HPV infection. If given before exposure to the virus, vaccination offers the best protection against this disease. Following vaccination, reductions of up to 90% in HPV infections in teenage girls and young women have been demonstrated by studies conducted in Australia, Belgium, Germany, New Zealand, Sweden, the United Kingdom and the United States of America.
In studies, the HPV vaccine has been shown to be safe and effective. WHO recommends that all girls aged 9–14 years receive 2 doses of the vaccine, alongside cervical cancer screening later in life.
When should I get vaccinated (or vaccinate my child)?
Vaccines protect us throughout life and at different ages, from birth to childhood, as teenagers and into old age. In most countries you will be given a vaccination card that tells you what vaccines you or your child have had and when the next vaccines or booster doses are due. It is important to make sure that all these vaccines are up to date.
If we delay vaccination, we are at risk of getting seriously sick. If we wait until we think we may be exposed to a serious illness – like during a disease outbreak – there may not be enough time for the vaccine to work and to receive all the recommended doses.
Why does vaccination start at such a young age?
Young children can be exposed to diseases in their daily life from many different places and people, and this can put them at serious risk.The WHO-recommended vaccination schedule is designed to protect infants and young children as early as possible. Infants and young children are often at the greatest risk from diseases because their immune systems are not yet fully developed, and their bodies are less able to fight off infection. It is therefore very important that children are vaccinated against diseases at the recommended time.
I didn’t vaccinate my child at the recommended time. Is it too late to catch up?
For most vaccines, it’s never too late to catch up. Talk to your healthcare worker about how to get any missed vaccination doses for yourself or your child.
Who can get vaccinated?
Nearly everyone can get vaccinated. However, because of some medical conditions, some people should not get certain vaccines, or should wait before getting them. These conditions can include:
- Chronic illnesses or treatments (like chemotherapy) that affect the immune system;
- Severe and life-threatening allergies to vaccine ingredients, which are very rare;
- If you have severe illness and a high fever on the day of vaccination.
These factors often vary for each vaccine. If you’re not sure if you or your child should get a particular vaccine, talk to your health worker. They can help you make an informed choice about vaccination for you or your child.
How are vaccines developed and tested?
The most commonly used vaccines have been around for decades, with millions of people receiving them safely every year. As with all medicines, every vaccine must go through extensive and rigorous testing to ensure it is safe before it can be introduced in a country.
An experimental vaccine is first tested in animals to evaluate its safety and potential to prevent disease. It is then tested in human clinical trials, in three phases:
- In phase I, the vaccine is given to a small number of volunteers to assess its safety, confirm it generates an immune response, and determine the right dosage.
- In phase II, the vaccine is usually given hundreds of volunteers, who are closely monitored for any side effects, to further assess its ability to generate an immune response. In this phase, data are also collected whenever possible on disease outcomes, but usually not in large enough numbers to have a clear picture of the effect of the vaccine on disease. Participants in this phase have the same characteristics (such as age and sex) as the people for whom the vaccine is intended. In this phase, some volunteers receive the vaccine and others do not, which allows comparisons to be made and conclusions drawn about the vaccine.
- In phase III, the vaccine is given to thousands of volunteers – some of whom receive the investigational vaccine, and some of whom do not, just like in phase II trials. Data from both groups is carefully compared to see if the vaccine is safe and effective against the disease it is designed to protect against.
Once the results of clinical trials are available, a series of steps is required, including reviews of efficacy, safety, and manufacturing for regulatory and public health policy approvals, before a vaccine may be introduced into a national immunization programme.
Following the introduction of a vaccine, close monitoring continues to detect any unexpected adverse side effects and further assess effectiveness in the routine use setting among even larger numbers of people to continue assessing how best to use the vaccine for the greatest protective impact. More information about vaccine development and safety is available here.
I still have questions about vaccination. What should I do?
If you have questions about vaccines be sure to talk to your healthcare worker. He or she can provide you with science-based advice about vaccination for you and your family, including the recommended vaccination schedule in your country.
When looking online for information about vaccines, be sure to consult only trustworthy sources. To help you find them, WHO has reviewed and ‘certified’ many websites across the world that provide only information based on reliable scientific evidence and independent reviews by leading technical experts. These websites are all members of the Vaccine Safety Net.
What is in a vaccine?
All the ingredients of a vaccine play an important role in ensuring a vaccine is safe and effective. Some of these include:
- The antigen. This is a killed or weakened form of a virus or bacteria, which trains our bodies to recognize and fight the disease if we encounter it in the future.
- Adjuvants, which help to boost our immune response. This means they help vaccines to work better.
- Preservatives, which ensure a vaccine stays effective.
- Stabilisers, which protect the vaccine during storage and transportation.
Vaccine ingredients can look unfamiliar when they are listed on a label. However, many of the components used in vaccines occur naturally in the body, in the environment, and in the foods we eat. All of the ingredients in vaccines – as well as the vaccines themselves – are thoroughly tested and monitored to ensure they are safe.
Are vaccines safe?
Vaccination is safe and side effects from a vaccine are usually minor and temporary, such as a sore arm or mild fever. More serious side effects are possible, but extremely rare.
Any licensed vaccine is rigorously tested across multiple phases of trials before it is approved for use, and regularly reassessed once it is introduced. Scientists are also constantly monitoring information from several sources for any sign that a vaccine may cause health risks.
Remember, you are far more likely to be seriously injured by a vaccine-preventable disease than by a vaccine. For example, tetanus can cause extreme pain, muscle spasms (lockjaw) and blood clots, measles can cause encephalitis (an infection of the brain) and blindness. Many vaccine-preventable diseases can even result in death. The benefits of vaccination greatly outweigh the risks, and many more illnesses and deaths would occur without vaccines.
Are there side effects from vaccines?
Like any medicine, vaccines can cause mild side effects, such as a low-grade fever, or pain or redness at the injection site. Mild reactions go away within a few days on their own.
Severe or long-lasting side effects are extremely rare. Vaccines are continually monitored for safety, to detect rare adverse events.
Can a child be given more than one vaccine at a time?
Scientific evidence shows that giving several vaccines at the same time has no negative effect. Children are exposed to several hundred foreign substances that trigger an immune response every day. The simple act of eating food introduces new germs into the body, and numerous bacteria live in the mouth and nose.
When a combined vaccination is possible (e.g. for diphtheria, pertussis and tetanus), this means fewer injections and reduces discomfort for the child. It also means that your child is getting the right vaccine at the right time, to avoid the risk of contracting a potentially deadly disease.
Is there a link between vaccines and autism?
There is no evidence of any link between vaccines and autism or autistic disorders. This has been demonstrated in many studies, conducted across very large populations.
The 1998 study which raised concerns about a possible link between measles-mumps-rubella (MMR) vaccine and autism was later found to be seriously flawed and fraudulent. The paper was subsequently retracted by the journal that published it, and the doctor that published it lost his medical license. Unfortunately, its publication created fear that led to dropping immunization rates in some countries, and subsequent outbreaks of these diseases.
We must all ensure we are taking steps to share only credible, scientific information on vaccines, and the diseases they prevent.
How does WHO help ensure vaccine safety?
WHO works to ensure that everyone, everywhere is protected by safe and effective vaccines. To do this, we help countries set up rigorous safety systems for vaccines and apply strict international standards to regulate them.
Together with scientists from around the world, WHO experts conduct ongoing monitoring to make sure that vaccines continue to be safe. We also work with partners to help countries investigate and communicate if potential issues of concern arise.
Any unexpected adverse side effects that are reported to WHO are evaluated by an independent group of experts called the Global Advisory Committee on Vaccine Safety.
2021 Recommended Vaccinations for Infants and Children (birth through 6 years) Parent-Friendly Version
Note: If your child misses a shot, you don’t need to start over. Just go back to your child’s doctor for the next shot. Talk with your child’s doctor if you have questions about vaccines.
*Two doses given at least four weeks apart are recommended for children age 6 months through 8 years of age who are getting an influenza (flu) vaccine for the first time and for some other children in this age group.
§Two doses of HepA vaccine are needed for lasting protection. The first dose of HepA vaccine should be given between 12 months and 23 months of age. The second dose should be given 6 months after the first dose. All children and adolescents over 24 months of age who have not been vaccinated should also receive 2 doses of HepA vaccine.
If your child has any medical conditions that put him or her at risk for infection or is traveling outside the United States, talk to your child’s doctor about additional vaccines that he or she may need.
Vaccine-Preventable Diseases and the Vaccines that Prevent Them
|Disease||Vaccine||Disease spread by||Disease symptoms||Disease complications|
|Chickenpox||Varicella vaccine protects against chickenpox.||Air, direct contact||Rash, tiredness, headache, fever||Infected blisters, bleeding disorders, encephalitis (brain swelling), pneumonia (infection in the lungs)|
|Diphtheria||DTaP* vaccine protects against diphtheria.||Air, direct contact||Sore throat, mild fever, weakness, swollen glands in neck||Swelling of the heart muscle, heart failure, coma, paralysis, death|
|Hib||Hib vaccine protects against Haemophilus influenzae type b.||Air, direct contact||May be no symptoms unless bacteria enter the blood||Meningitis (infection of the covering around the brain and spinal cord), intellectual disability, epiglottitis (life-threatening infection that can block the windpipe and lead to serious breathing problems), pneumonia (infection in the lungs), death|
|Hepatitis A||HepA vaccine protects against hepatitis A.||Direct contact, contaminated food or water||May be no symptoms, fever, stomach pain, loss of appetite, fatigue, vomiting, jaundice (yellowing of skin and eyes), dark urine||Liver failure, arthralgia (joint pain), kidney, pancreatic, and blood disorders|
|Hepatitis B||HepB vaccine protects against hepatitis B.||Contact with blood or body fluids||May be no symptoms, fever, headache, weakness, vomiting, jaundice (yellowing of skin and eyes), joint pain||Chronic liver infection, liver failure, liver cancer|
|Influenza (Flu)||Flu vaccine protects against influenza.||Air, direct contact||Fever, muscle pain, sore throat, cough, extreme fatigue||Pneumonia (infection in the lungs)|
|Measles||MMR** vaccine protects against measles.||Air, direct contact||Rash, fever, cough, runny nose, pink eye||Encephalitis (brain swelling), pneumonia (infection in the lungs), death|
|Mumps||MMR**vaccine protects against mumps.||Air, direct contact||Swollen salivary glands (under the jaw), fever, headache, tiredness, muscle pain||Meningitis (infection of the covering around the brain and spinal cord), encephalitis (brain swelling), inflammation of testicles or ovaries, deafness|
|Pertussis||DTaP* vaccine protects against pertussis (whooping cough).||Air, direct contact||Severe cough, runny nose, apnea (a pause in breathing in infants)||Pneumonia (infection in the lungs), death|
|Polio||IPV vaccine protects against polio.||Air, direct contact, through the mouth||May be no symptoms, sore throat, fever, nausea, headache||Paralysis, death|
|Pneumococcal||PCV13 vaccine protects against pneumococcus.||Air, direct contact||May be no symptoms, pneumonia (infection in the lungs)||Bacteremia (blood infection), meningitis (infection of the covering around the brain and spinal cord), death|
|Rotavirus||RV vaccine protects against rotavirus.||Through the mouth||Diarrhea, fever, vomiting||Severe diarrhea, dehydration|
|Rubella||MMR** vaccine protects against rubella.||Air, direct contact||Sometimes rash, fever, swollen lymph nodes||Very serious in pregnant women—can lead to miscarriage, stillbirth, premature delivery, birth defects|
|Tetanus||DTaP* vaccine protects against tetanus.||Exposure through cuts in skin||Stiffness in neck and abdominal muscles, difficulty swallowing, muscle spasms, fever||Broken bones, breathing difficulty, death|
* DTaP combines protection against diphtheria, tetanus, and pertussis.
** MMR combines protection against measles, mumps, and rubella.
Here’s what else you can expect from our legal and business services,
We can help you to:
- Organize and structure all departments of your business;
- Be more efficient by smoothing business processes;
- Guide your team tasks with standard operating procedures;
- Save a lot of time and boost your productivity;
- Save thousands of money in lawyer fees;
- Grow your business and close great deals; and
- On matters: Negotiation, Mediation, Arbitration and Court Litigation.
It’s time to bring your life and business to another level. Start to optimize and streamline your life and business today. Get all the professional-grade personal and business templates you need to plan, start, organize, manage, finance, and grow your life and business; one click away in the below links!
FREE DOWNLOADABLE PERSONAL TEMPLATES
For our ONLINE legal/business services, please follow this instruction:
- click the following website link, www.raynessanalytica.com.
- once on the website’s homepage, an ONLINE brown chat box will appear at the right bottom end of screen;
- click on the chat tab, insert NAME, EMAIL and PHONE NUMBER; and
- proceed when ready, letting us know the issue(s) and eliciting HELP from our lawyers and business experts.
P.S. Sometimes all that’s needed is a form, document or tip that can solve problems or issues that repeat in your life or business. To save you from unnecessary legal costs by hiring lawyer(s), here are customizable smart templates/forms that you can use as often as you need; flexible enough to allow for changes without leaving you exposed. Click the following link, FREE CUSTOMISABLE LEGAL TEMPLATES to search for the desired template, download it and embark on your great legal adventure – and don’t forget to bring the bug spray. For each template, we have numerous different customizable documents.
Go to the “Order Now” page and make a request.
We look forward to addressing your concerns and earning your trust and confidence in us!
📚[RNA (Legal and Business Consultants) 🤝🏾 KUBWA & CO. ADVOCATES]⚖️
Someday everyone will be doing it Our Way. We’re doing it Now!
The Centre in [East] Africa for Legal and Business Élites
Kenya’s E-Lawyers and Business Specialists