Minor nit. The ratio you refer to is called efficacy, not effectiveness. Effectiveness is the number you would get by observing people in the real world rather

Minor nit. The ratio you refer to is called efficacy, not effectiveness. Effectiveness is the number you would get by observing people in the real world rather than the phase 3 trial. It's worth noting the difference because we're also starting to get data on effectiveness, like the CDC study that tracked healthcare workers and found the vaccine also prevented asymptomatic infection.