4 doctors weighed in:

How many days before the symptoms of conjunctivitis start are you infectious and spreading the virus?

4 doctors weighed in
Dr. Simon Tsiouris
Internal Medicine - Infectious Disease
3 doctors agree

In brief: Depends

Different viruses can cause conjunctivitis and they will begin shedding at different times before symptoms start.
In general, someone who develops viral conjunctivitis probably started shedding virus (and could spread it to someone else) 24-48 hours before their own symptoms started.

In brief: Depends

Different viruses can cause conjunctivitis and they will begin shedding at different times before symptoms start.
In general, someone who develops viral conjunctivitis probably started shedding virus (and could spread it to someone else) 24-48 hours before their own symptoms started.
Dr. Simon Tsiouris
Dr. Simon Tsiouris
Thank
Get help from a real doctor now
Dr. Shontae Buffington
Board Certified, Pediatrics
13 years in practice
843K people helped
Continue
108,000 doctors available
Read more answers from doctors