Part of the show Flu and Viruses
Mark in Bletchley asked:
Iíve been in contact with someone whoís had the flu quite badly but I didnít catch it. Why would that be?
We put this question to Dr John Wood:
Well, I donít know the particular circumstances. Itís possible, I hope, that maybe he had a vaccine but maybe not. He could have been exposed to flu in the past which gave him some immunity. Maybe he didnít know heíd been exposed to flu in the past. It may have been a kind of sub-clinical infection he didnít notice. I expect he had some kind of immunity.