Is a third shot of coronavirus vaccine needed?

Is a third shot of coronavirus vaccine needed?
15 September, 2021
News
Dr Patrick Tang, Division Chief Microbiology speaks on Al Jazeera about the 3rd dose of the COVID vaccine. https://youtu.be/qyWXbmSMNAE read post

Dr Patrick Tang, Division Chief Microbiology speaks on Al Jazeera about the 3rd dose of the COVID vaccine.