Part 4/13:

These vaccines have revolutionized the vaccine landscape, leveraging synthetic messenger RNA to instruct cells to produce the virus’s spike protein, thereby eliciting an immune response. Since their rollout in 2020, millions have received these vaccines globally, with well-documented safety and high efficacy rates (Pfizer ~95%, Moderna ~94%).

Inactivated Virus Vaccines (Sinovac/Covaxin):

Traditional in approach, these vaccines use killed viral particles. When injected, they trigger the immune system to recognize multiple components of the virus, not just the spike protein. While their efficacy rates appear lower—around 50-60%—they are considered safe, with a long track record and widespread use across many countries.

Vaccine Efficacy and Effectiveness: