The story is still developing. I will provide updates as I receive them.
It has been reported that the participant took the placebo.
To my knowledge, no vaccines are tested against a true placebo.
The problem is: this trial’s placebo is ALSO a vaccine.
‼️‼️The placebo being used in the Brazilian trial of the ChAdOx1 nCoV-19 vaccine is a vaccine for meningitis: MenACWY.‼️‼️‼️
ClinicalTrials.gov Identifier: NCT04324606