蜜芽传媒

Maybe you've been lucky and have escaped the Covid-19 virus. Some people have even been left untouched by the Omicron variant, which spreads more rapidly than other mutations of the virus, but seems to be less serious. So how is it that some people don't get affected, even if they are living with someone who has Covid?

Professor Ajit Lalvani is a specialist in infectious diseases at Imperial College, London where they have been trying to "unlock the mystery". They believe it may be down to memory recognition.

Image: Crowd of busy commuters with protective face mask walking through platforms at subway station in Hong Kong. Credit: Getty Images