Doubts arise over efficacy of China-produced Sinopharm vaccine

Bahrain recommends Pfizer boosters for over 50s with comorbidities after a COVID-19 surge, despite high Sino Farm vaccination rates. The Sino Farm vaccine uses inactivated viruses to teach the immune system to fight the coronavirus. Antigen presenting cells process these viruses, activating T and B cells. Memory B cells help the body remember and reproduce antibodies. Despite the surge, most hospitalized were unvaccinated, showing Sino Farm's effectiveness.

What is the mechanism by which the Sino Farm vaccine teaches the immune system to attack the coronavirus?

What role do B cells play in the immune response after vaccination?

How does the immune system remember the response to the Sino Farm vaccine?

Why did Bahrain recommend booster shots of Pfizer Bio N Tech?

What percentage of people hospitalized during the current COVID-19 wave in Bahrain had not been vaccinated?