FRANCOIS BALLOUX
"There have been previous reports in the media of patients having been 'reinfected'.
I'm not aware any of these have been confirmed. How long immunisation to #COVID19 lasts for remains unknown, but it is likely to protect against reinfection for ≥1 year. "(2/4)
Some asymptomatic patients might remain #COVID19 positive if they failed to clear the infection.
If such healthy 'chronic' carriers remained infectious ('long-term shedders'), this would further add further epidemiological challenges. (3/4).
Mystery In Wuhan: Recovered Coronavirus Patients Test Negative ... Then Positive
It is premature to conclude whether transmission through 'long-term shedding' happens in #COVID19. Though, transmission by healthy 'chronically infected' carriers is known for other viruses (e.g. HSV, genital Herpes) and even bacteria ('Typhoid Mary'). (4/4)
Francois Balloux on Twitter
Francois Balloux on Twitter