'Gender-biased infections' may exist Viruses can evolve to become more aggressive in men than in women - at least in theory, a study suggests.
The report, published in Nature Communications, argues there is a benefit to a virus "going easy" in women as it helps it spread.
Some infections are known to be less deadly in women, but this is largely put down to differences in the immune system.
Experts said the findings were intriguing. BBC News