Claim: A photo shows two bags of donated blood, one lighter red and one almost black, and says the redder one is from a non-vaccinated person and the darker one is from a vaccinated person.
Fact-check: No evidence Covid-19 vaccine makes blood look different - Full Fact
Verdict: nhs blood and transplant says it has observed no difference between vaccinated and unvaccinated people's blood.
Organisation: Full Fact
Author: Grace Rahman
Date published: 2021-09-22T00:00:00