“Why do people still get tuberculosis (TB) even though they had the BCG vaccine? I guess herd immunity isn’t real.”

This is among the misinformation spread by anti-vaccine proponents that has Dr Megat Mohamad Amirul Amzar Megat Hashim slapping his forehead – several times – by his account.

“The BCG (Bacille Calmette–Guérin) vaccine is a vaccine used against...