In 2017, British researchers conducted a study among 35,000 adults and found that the average body temperature was 36.6°C (97.8°F), much lower than the normal. Later on, in early 2019, a study conducted by American researchers discovered the average temperature among Americans had dropped by 0.02°C (0.05°F) since the 19th century. Click to read the full case...
Source: https://journal.medizzy.com/the-normal-body-temperature-is-dropping/