About 90% of all deaths from influenza occur in people aged 65 years and older, the researchers tried to figure out what is the problem. As it turned out, the fault is not the virus itself, and the human immune system. The protective properties of the organism to the elderly years are reduced. As a result, the risk of generalization of infection and complications is increased tenfold.
The researchers found changes in three genes (TLR7, MAVS and CASP1). Mutations always happen in them, but accumulate in large numbers to retirement age. As a result of genetic damage to the body's failure to fight the virus. Associated bacterial infection in the form of pneumonia. Toxins do their thing and slowly kill kidney liver and heart disease, to old age and so has time to wear out.
Older people have very low protection against viruses, say the doctors. That is why it is so important to care about health at this age.