With the pandemic still ongoing one question that many people have about the available vaccines is why do some of them require two shots? Currently out of the three main vaccines being offered in the United States which are from Johnson and Johnson, Pfizer, and Moderna, the latter two require more than one shot.
Why 2 shots?
To answer the question of why 2 shots are required the answer is basically to increase effectiveness. During preliminary studies for the vaccine, researchers discovered that both the Pfizer vaccines and Moderna Vaccine provoke a relatively weak immune response when given just one dose. The way to combat this is to add a second dose which has proved very effective. The way this works is the first dose starts the process of building up protection and the second dose reinforces that protection.
How should the doses be scheduled?
Guidance on the vaccines is changing so it is important to stay up to date however currently the second dose is given a few weeks after your first dose. For Pfizer, it is recommended to receive the second dose 3 weeks or 21 days after your first dose. For Moderna, it is recommended to receive the second dose 4 weeks or 28 days after your first dose.
As with all health matters getting a professional opinion is key if you have any concerns or questions. Every person is different which means that every situation is different so talking to professionals will help you be in a better position. Experts will know just how to get the very best care for your needs as well as answer any questions you may have. Additionally, the CDC and other governmental resources can help guide you in the right direction when it comes to COVID-19 and vaccines.
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