The vaccine has also been found to be 100 per cent effective against severe diseases, as defined by the CDC, and 95.3 per cent effective against severe cases of Covid-19 as defined by the FDA.
However, there is still a “small proportion” of people who may get the virus.
Murdoch said this is fairly typical of vaccines against any disease, as “there is no perfect vaccine”.
However, effectiveness rates of the Covid-19 vaccines are “at the higher end of any vaccine we have”.
While it was “not necessarily a surprise” that a vaccinated person could still contract Covid-19, it was an “uncommon event”, Murdoch said.