*Immunity to Covid-19 could be lost in months, UK study suggests.*

More precisely, the study finds that antibodies to Covid-19 tend to disappear after some months. Other kinds of immune response may last longer. We do not know whether people will become vulnerable to reinfection 3, 6 or 12 months after recovering from Covid-19.

This is additional reason why we should try hard to cut off transmission and quickly — the approach used by East Asian countries rather than the approach of the numskull.