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Vaccines are used to prevent infectious diseases. You use them before you get sick to avoid illness. Some vaccines are for use seasonally (e.g., flu vaccines) and some are used only at certain ages in the normal vaccination schedules. It depends very much on the type of vaccine and the diseases they are intended to prevent, the age of the patient, and the location where the patient lives and/or travels. Your health care professional can provide you a listing of the recommended types of and times for the vaccinations recommended for you.
Vaccines provide protection by reproducing antibodies which fights the poliovirus, or whatever the virus is the vaccine is intended to protect against. Some vaccines may also protect against certain bacterial infections, such as pneumonia.
People choose to have vaccines because the risk of illness from the vaccine is a lot less than having an illness full blown and doing some real damage. The major controversy has been a preservative in most vaccines called Thimerasol, because it contains mercury.
Yes, some can. Some vaccines are safe in pregnancy, and others are not. Your doctor can tell you what vaccines are right for you before, during and after pregnancy.
some sick people stay at home or in the hospital
Certain Peope are allergic to the proteins in the white of the duck egg which are entirely different from hose in a chicken egg
Some people believe that vaccinations can have negative side effects or complications. Others may have religious or philosophical objections to vaccines. However, scientific research overwhelmingly supports the safety and effectiveness of vaccines in preventing infectious diseases and protecting public health.
some people will some people wont.
Yes, because some people get sick from them.
There is no ban on HPV vaccines. In fact, in some states girls are required to receive HPV vaccines for school.
some people are homeless and they get sick
There are a few circumstances that can create some risk of getting the virus, such as in people whose immune systems aren't working right (e.g., they recently had cancer chemotherapy or HIV or some other immuno-suppressive disorder). See the list of people in the related question below who should not get vaccinated with the types of vaccines that contain a live "attenuated" virus. Attenuated means weakened. When someone has a weak immune system, they may be susceptible to the weakened form of virus in the vaccine. But they would not be able to be sick from getting vaccines that contain "dead" viruses. With the flu vaccines, for example, the shots have dead viruses in them but the nasal mist has live attenuated viruses in it.Sometimes. If the vaccine is a live attenuated (weakened) vaccine, then you get a dose of virions (viral particles/viruses) that are no longer dangerous to humans as they have been weakened so they can not make you sick. Other vaccines (such as Gardasil) are made with Virus-like particles (VLP) and these are just pieces of the virus (such as the envelope) not actually working and replicating viruses so they can not make you sick either.