Those who became infected with COVID had higher levels of gene expression for two key proteins, ACE2 and TMPRSS2.

A new study from researchers at the George Washington University has found that certain bacteria living in the nose may influence how likely someone is to get a COVID-19 infection.

The team then tested how the enzyme ACE2 affects the development of the placenta, using gene-editing to create placental organoids with different versions of the ACE2 gene. "We wanted to ...