Flu Symptoms 2024 Adults Today 2024. It is more likely to cause complications, such as pneumonia, in older adults than younger. Dehydration, wheezing, severe head and muscle aches and high fevers that are staying high, above 104, are the main symptoms driving people to the hospital, desai said.

Overall, most surveillance systems in the uk indicated lower influenza activity in the 2023 to 2024 season than in the 2022 to 2023 season. People in their 30s and 40s with persistent changes in bowel habits or rectal bleeding should make sure to consult their doctors and ask specifically about whether.