At birth, you will only have around three to four ethmoidal cells; however, as an adult, you will normally have around 10 to 15. These ethmoidal cells form what is more commonly referred to as the ...
Sinus infections themselves aren’t contagious, but the viruses that cause most of them are. Viral sinus infections often follow colds or flu, which spread through respiratory droplets when someone ...
This work was commissioned, produced, and edited by The Atlantic's editorial staff. Support for this work was provided in part by the organizations listed here. BRCA mutations are inextricably ...