CNS TV Second COVID-19 booster shot gets mixed views from adults 50+ COLLEGE PARK, Md. – The FDA recently authorized a fourth COVID-19 shot to be taken four months after the first booster. Some people have debated whether getting another vaccine is necessary. Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window) March 31, 2022