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More Good News as Fever Levels Stay Near Historic Lows

June 4, 2021  ||  by Matt Albasi

To round out a week full of good health news, the number of people experiencing fevers continues to be near historic lows. Kinsa’s Influenza-like Illness (ILI) levels currently indicate that about 0.4% of the population has a fever. This is only slightly higher than fever levels a year ago —when pandemic restrictions were widespread in efforts to "flatten the curve” — and well below 2018 and 2019 levels.

Line chart showing Influenza-like illness (ILI) from 2018 to present showing ILI is still much lower than 2018 and 2019 but slightly higher than 2020

The rate of transmission (Rt) - a measure of how many other people one sick person will infect -  is stable at 0.96, indicating that overall illness transmission is mildly decreasing. A transmission rate below one means the number of people experiencing illness will decrease.

Last week, data showed people younger than 10 were experiencing increased rates of fever. This week, that trend has leveled off and mostly returned to normal. Most other age groups are showing the same or less illness than last week.


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