Japan’s fifth wave of Covid-19 Delta variant has virtually disappeared so dramatically that some scientists are puzzled as to why it happened. One team suggests the highly infectious Delta strain mutated into extinction on the island nation.
In mid-August, Japan experienced a peak in Covid-19 infections, recording over 23,000 new cases per day. Now the metric is just around 170, with deaths attributed to the disease mostly remaining in single digits this month.
The decline has been at...
