Are kids' noses protecting them from coronavirus?

Older nasal passages are lined with more ACE2 receptors, study finds

It could come down to a nose, or more accurately, the age of a nose, when it comes to unpicking why children seem less vulnerable to infection with SARS-CoV-2.  

US researchers believe their findings on angiotensin converting enzyme 2 (ACE2) receptors in nasal passages may provide a clue for the different ways the coronavirus behaves in children and older adults.