Anosmia, the loss of smell and ageusia, the loss of taste are symptoms that are associated with between 1/3 to 2/3 of the cases testing positive for COVID-19. So if someone doesn’t have a sinus infection, seasonal allergies or another known cause for the loss of smell and or taste…. then they should assume that they might be infected and be extra careful so as to not infect others around them until they can be tested.