[beojan]

India is a Commonwealth country, and I wouldn't be surprised if a lot of people still think in imperial (not US customary) units.

Also, here in the UK, for the purposes of identifying COVID-19 symptoms, a fever is being defined as 38.6 °C = 100.0 °F, so US recommendations are clearly having an influence in other countries.

[garmaine]

The US doesn't recognize 100.0 °F as a fever. That's within normal range.

[RandomBacon]

There are different definitions of "fever" in medical websites. Some say anything above a person's normal average temperature is a fever, with it being considered a serious fever if the temperature is above 100.4°F.

[BerislavLopac]

100 F is 37.8 (more precisely 37.77777...) C.

[beojan]

Indeed. It's the Celsius figure that I misquoted.

https://www.gov.uk/government/publications/coronavirus-covid...