HealthData
How many measles cases are there in the US?
1,476 Cases in 2026, Pennsylvania16 Cases in 2025
Health
Medicine and public health, explained with guidance from agencies and medical bodies, never as personal advice.
HealthData
Is flu and respiratory illness high in my state?
56 listed, week ending Oct 31
- 26 Low
- 22 Very Low
- 1 Moderate
- 7 no data
HealthExplainer
What is the difference between flu and COVID symptoms?
The CDC says a person cannot tell the difference between flu and COVID-19 by the symptoms alone, and that testing is needed to confirm a diagnosis.
HealthExplainer
Is it a cold or the flu?
The CDC says flu is in general worse than the common cold, with symptoms that are typically more intense and begin more abruptly, while cold symptoms are usually milder.
HealthExplainer
How bad is flu season this year?
CDC classifies the severity of the 2026-2027 flu season so far as low across all ages, as of its report for the week ending October 31, 2026.
HealthExplainer
How long does the flu last?
Most people who get flu recover in a few days to less than two weeks, according to the Centers for Disease Control and Prevention.
HealthExplainer
What are the symptoms of the flu?
The CDC lists fever or feeling feverish and chills, cough, sore throat, runny or stuffy nose, muscle or body aches, headaches and fatigue as the symptoms of flu.
HealthExplainer
When is flu season?
Flu season in the United States usually occurs in the fall and winter, and flu activity most often peaks between December and February, according to the CDC.
HealthExplainer
What are the symptoms of norovirus?
The CDC lists diarrhea, vomiting, nausea and stomach pain as the most common symptoms of norovirus, with fever, headache and body aches as other symptoms.
HealthExplainer
When does Medicare open enrollment end?
Medicare open enrollment ends on December 7. The period runs from October 15 to December 7 every year, the Centers for Medicare and Medicaid Services said.
HealthExplainer
When is the HealthCare.gov open enrollment deadline?
Open enrollment for 2027 health coverage on HealthCare.gov began on November 1, 2026, and runs through January 15, 2027, the Centers for Medicare and Medicaid Services said.