On January 11th, 2021, the European Medicines Agency (EMA) organized its most recent press briefing.
During that briefing, Marco Cavaleri, head of EMA’s biological health threats and vaccines strategy, said that there is no way to know the number of antibodies someone needs to be ‘protected‘ from COVID.
Although there is a relationship between neutralizing antibodies and protection, it is impossible to know where the threshold is that determines whether someone will get COVID or not.