That's only if infection grants lifetime immunity. Other coronaviruses (like those that cause colds) only grant immunity for 4-12 months. We don't know if thi

That's only if infection grants lifetime immunity. Other coronaviruses (like those that cause colds) only grant immunity for 4-12 months. We don't know if this coronavirus is the same, but if it is, we may not be able to achieve that herd immunity without biannual vaccinations.