Flu 2024 Symptoms Ukf. View flunet chart for different time periods and. 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.

Symptoms first start to appear between five and 21 days after an infection, though a person can transmit the virus one to four days before symptoms appear. View more influenza surveillance outputs.