President Joe Biden is struggling to keep his promise to follow the science on the coronavirus pandemic response, wearing a mask outside in contradiction to his own government’s latest guidance.

A fully vaccinated Biden has continued in recent days to wear a mask indoors and outdoors. That is despite the Centers of Disease Control and Prevention, the country’s premier public health agency, finding people inoculated against COVID-19 who leave their faces uncovered are at low risk unless they are in large groups.