BBC News: Children are less likely than adults to develop severe Covid, because cells in their nose are better at fighting off the virus, a study suggests.
Lab tests show ageing adult nose cells contain 100 times more virus in the first few days after an infection.
The lab discovery could explain why older adults are hit worst by Covid and children are rarely very ill.
Anti-viral treatments should be tailored to different age groups, the UK researchers say.
The nose is the first place Covid enters the body – so scientists wanted to look in detail at what happens inside this so-called viral production factory.