Class 9 Exam  >  Class 9 Videos  >  Chemistry for Class 9  >  Vaccination

Vaccination Video Lecture | Chemistry for Class 9

14 videos|60 docs|47 tests

Top Courses for Class 9

FAQs on Vaccination Video Lecture - Chemistry for Class 9

1. What is vaccination?
Ans. Vaccination is a medical procedure in which a vaccine is administered to provide immunity against a specific disease. It involves the introduction of a weakened or killed pathogen into the body to stimulate the immune system to produce antibodies and memory cells that can recognize and fight off the actual disease-causing agent.
2. Why is vaccination important?
Ans. Vaccination is important because it helps prevent the spread of infectious diseases and protects individuals and communities from potentially serious illnesses. It not only reduces the risk of contracting diseases but also helps in reducing the severity of the illness if one does get infected. Vaccination also plays a crucial role in achieving herd immunity, where a large portion of the population is immunized, making it difficult for the disease to spread.
3. Are vaccines safe?
Ans. Yes, vaccines are generally safe and undergo rigorous testing before they are approved for use. The vaccines go through multiple stages of testing, including preclinical studies and clinical trials, to ensure their 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 side effects are extremely rare. The benefits of vaccination far outweigh the risks associated with the diseases they protect against.
4. How long does immunity from vaccines last?
Ans. The duration of immunity provided by vaccines can vary depending on the disease and the vaccine itself. Some vaccines provide lifelong immunity, while others may require booster shots to maintain protection. For example, the measles, mumps, and rubella (MMR) vaccine provides long-lasting immunity, whereas the tetanus vaccine requires periodic booster shots every 10 years. It is important to follow the recommended vaccination schedules to ensure continued protection.
5. Can vaccines cause autism?
Ans. No, vaccines do not cause autism. Numerous studies have been conducted to investigate the alleged link between vaccines and autism, and they have consistently found no evidence to support such a connection. The initial study that suggested a link between the measles, mumps, and rubella (MMR) vaccine and autism has been discredited and retracted. Vaccines are thoroughly tested for safety before approval, and their benefits in preventing serious diseases far outweigh any unfounded concerns.
14 videos|60 docs|47 tests
Explore Courses for Class 9 exam
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev
Related Searches

shortcuts and tricks

,

Summary

,

study material

,

Free

,

video lectures

,

Sample Paper

,

practice quizzes

,

Semester Notes

,

ppt

,

Extra Questions

,

Vaccination Video Lecture | Chemistry for Class 9

,

Previous Year Questions with Solutions

,

Important questions

,

past year papers

,

Exam

,

Vaccination Video Lecture | Chemistry for Class 9

,

pdf

,

Viva Questions

,

Vaccination Video Lecture | Chemistry for Class 9

,

MCQs

,

mock tests for examination

,

Objective type Questions

;