How Long Is Pink Eye Contagious?

Quick Answer

Viral pink eye (conjunctivitis) is contagious for 10–14 days from the onset of symptoms. Bacterial pink eye becomes non-contagious 24–48 hours after starting antibiotic eye drops. Allergic pink eye is not contagious at all since it is caused by an immune reaction to allergens, not an infection.

Contagious Period by Type

Type	Contagious?	Contagious Period	Return to School/Work
Viral	Yes	10–14 days from onset	When symptoms improve (varies by policy)
Bacterial	Yes	Until 24–48 hrs on antibiotics	24 hours after starting antibiotics
Allergic	No	Not contagious	No restrictions
Chemical/irritant	No	Not contagious	No restrictions

Viral Pink Eye: The Most Contagious Form

Viral conjunctivitis, most often caused by adenoviruses, is highly contagious. The virus can survive on surfaces for up to two weeks and spreads through direct contact with infected eye secretions, contaminated hands, or shared items like towels and pillowcases. You are most contagious during the first 3–5 days when discharge is heaviest, but the virus can spread for the full 10–14 day window.

There is no antibiotic treatment for viral pink eye—it must run its course. This is why the contagious period is significantly longer than bacterial cases.

Bacterial Pink Eye: Shorter Contagious Window

Bacterial conjunctivitis, commonly caused by Staphylococcus aureus or Streptococcus pneumoniae, is also contagious through direct contact. The key difference is that antibiotic eye drops or ointment dramatically shorten the contagious period. Most physicians clear patients to return to work or school 24 hours after beginning antibiotic treatment.

Without antibiotics, bacterial pink eye remains contagious for 7–10 days until symptoms fully resolve.

School and Work Return Guidelines

Policies vary by state and institution. The American Academy of Ophthalmology (AAO) states that routine exclusion from school is not necessary for pink eye, as the infection is no more contagious than the common cold. However, many schools and daycares still require:

• Bacterial cases: A note from a doctor confirming 24 hours of antibiotic treatment
• Viral cases: Symptom improvement or a doctor's clearance
• Allergic cases: No exclusion needed

Check with your specific school or employer for their policy.

How Pink Eye Spreads

• Touching or rubbing the infected eye, then touching another person
• Sharing towels, washcloths, pillowcases, or eye makeup
• Contact with respiratory droplets from coughing or sneezing (viral)
• Contaminated swimming pool water
• Not cleaning contact lenses properly

Prevention Tips

• Wash hands frequently with soap and water for at least 20 seconds
• Avoid touching or rubbing your eyes
• Do not share personal items like towels, pillows, or cosmetics
• Disinfect frequently touched surfaces (doorknobs, phones, keyboards)
• Replace eye makeup and contact lens cases after an infection
• If one eye is infected, avoid touching the uninfected eye

When to See a Doctor

Seek medical attention if you experience severe eye pain, sensitivity to light, blurred vision, or thick green/yellow discharge. Newborns with any eye redness or discharge should be seen immediately, as neonatal conjunctivitis can be serious.