- Flu during childhood plays a pivotal role in deciding the immunity system against similar illness later in life.
- Scientists have found that people's ability to fight off the flu virus is determined not only by the subtypes of flu they have had throughout their lives but also by the sequence in which they have been infected by the viruses.
- The research offers an explanation for why some people fare much worse than others when infected with the same strain of the flu virus, and the findings could help inform strategies for minimising the effects of the seasonal flu.