Two-and-a-half hours of vigorous exercise every week cut the chance of catching the flu by approximately 10%, research suggests.
Physical activity which leads to sweating or hard breathing reduces flu or flu-like illness, experts at the London School of Hygiene and Tropical Medicine found.
Walking, light jogging and other gentle sports which did not raise heart rate, were found to have little effect.
The Flusurvey also found overall flu levels across the UK appear to be down on last year, with the influenza season apparently curbed by a lack of illness among children and young people.
More top news
Scientists say they have identified three proteins that can indicate when the disease is present.
Sue and Alex Tatham are still together after meeting on the show 27 years ago and now have two children.
Blind Date featured several pre-celebrity personalities who appeared on the show before they became famous: Here's our pick of them...