According to the protocols for their studies, which they released late last week, a vaccine could meet the companies’ benchmark for success if it lowered the risk of mild Covid-19, but was never shown to reduce moderate or severe forms of the disease, or the risk of hospitalization, admissions to the intensive care unit or death. To say a vaccine works should mean that most people no longer run the risk of getting seriously sick. That’s not what these trials will determine.
https://www.nytimes.com/2020/09/22/opinion/covid-vaccine-coronavirus.html
