03Why are children administeredmultiple doses of some vaccines? It depends on whether the vaccine is live or inactivated (killed). For an inactivated vaccine, multiple doses are required. Each dose contains some fixed number of disease antigens (virus or bacteria).With each dose, your child develops immunity in 02 How do we know whether vaccines can cause long-term health issues? A vaccine is released or licensed for public use only after assessing its safety and efficacy in clinical trials. Also, the vaccine is continuously monitored whilst its doses are administered to millions.With over 50 years of experience with vaccines,the chance of a vaccine causing any unexpected long-term health issue is negligible. Moreover, there is no biological evidence saying vaccines would cause any long-term effects. Researchers have already performed numerous studies to observe the many potential risks of vaccines. Fortunately, if vaccines were identified as a risk factor, we would have known by now! Many experts believe that withholding a vaccine that is effective against diseases while its long-term effects are being studied would be unethical as it could potentially save many lives. Also, waiting for many years to look for long-term health issues is somewhat impractical. 29
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