Behind him, in the race for silver and bronze, it first appeared as if his compatriot Lawrence Cherono, 33, would prevail.
Simone Manuel diving in for the final leg of the mixed 4x100m freestyle relay final at the World Swimming Championships in Gwangju, South Korea.
On 26 July, there were 60,157 cases detected in Japan, breaking the record of 44,961 cases recorded on 10 May.