How come a doctor in his 30s has died?

How safe is it to travel? And is a face mask useful and how often does it have to be replaced? from BBC News - World https://ift.tt/2sLbMX...

How safe is it to travel? And is a face mask useful and how often does it have to be replaced?

from BBC News - World https://ift.tt/2sLbMXA