The sick-day rules are the shortest rules in donation. Any active infection — cough, cold, sore throat, fever, stomach bug — defers you until you are fully recovered. Not because one sniffle ruins a unit, but because the rule must be blind to severity to be safe at scale.
What counts as “recovered”
- Symptoms fully gone (not “mostly gone, except”)
- Fever-free without paracetamol for at least a day or two
- If antibiotics: the course completed, not abandoned halfway
- Back to your normal energy
A leftover mild sniffle at day five without fever? Most centres will take you with an honest declaration. A wet cough on day two? Come back next week.
The part people get wrong
Donors with a mild cold sometimes donate anyway to “not waste the appointment.” The appointment is not the scarce resource — the trust in every unit is. Declaring a sniffle and walking away costs nothing; it is also exactly the habit that keeps the blood supply safe.
Seasonal fevers (dengue, typhoid, malaria)
These defer you much longer — weeks to months after recovery — because they linger in blood. Our dengue and platelet pages cover the monsoon-specific rules.