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Fun Video: How do Vaccines Work? Video Lecture | Science Class 8

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FAQs on Fun Video: How do Vaccines Work? Video Lecture - Science Class 8

1. How do vaccines work?
Ans. Vaccines work by introducing a small, harmless part of a pathogen (such as a virus or bacteria) into the body. This stimulates the immune system to recognize and remember the pathogen, so that if the person is exposed to the actual pathogen later on, their immune system can respond more quickly and effectively to prevent or reduce the severity of the infection.
2. Are vaccines safe?
Ans. Yes, vaccines are generally safe. Before a vaccine is approved for use, it undergoes rigorous testing and evaluation to ensure its safety and effectiveness. The side effects of vaccines are usually mild and temporary, such as soreness at the injection site or a low-grade fever. Serious adverse reactions are extremely rare.
3. How long does vaccine immunity last?
Ans. The duration of vaccine-induced immunity can vary depending on the specific vaccine and the individual's immune response. Some vaccines provide long-lasting immunity, while others may require booster shots to maintain protection. For example, vaccines like the measles, mumps, and rubella (MMR) vaccine typically provide lifelong immunity, while influenza vaccines require annual vaccination due to the virus's ability to change.
4. Can vaccines cause autism?
Ans. No, vaccines do not cause autism. Numerous scientific studies have thoroughly investigated the alleged link between vaccines and autism and have found no credible evidence to support such a connection. The original study that claimed this link has been debunked and retracted, and subsequent research has consistently shown that vaccines are not a cause of autism.
5. Can vaccines give you the disease they are meant to prevent?
Ans. No, vaccines cannot give you the disease they are intended to prevent. Most vaccines contain either weakened or inactivated forms of the pathogen, or specific parts of it, which cannot cause the disease. These components are designed to stimulate an immune response without causing illness. In rare cases, some live attenuated vaccines may cause very mild symptoms similar to the disease, but the actual disease itself cannot be contracted from the vaccine.
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