Arizona is seeing a rise in flu cases and hospitalizations, as well as its largest measles outbreak since the early 1990s. Both illnesses are respiratory diseases that spread easily in groups and can be prevented by vaccines.
Most of the flu cases this season are due to Influenza A (H3N2). There is no indication that this strain causes more severe illness than others. Common symptoms include fever, headache, muscle aches, cough, congestion, or other respiratory issues. While most people recover with rest and supportive care, certain groups—such as young children, older adults, pregnant individuals, and those with health conditions—are at higher risk for serious complications.
Measles spreads through tiny droplets in the air when an infected person coughs or sneezes. The virus can linger in the air for up to two hours after an infected person leaves a room. Symptoms typically include fever, cough, runny nose, red watery eyes, and a rash that starts on the face several days after initial symptoms. People with measles are contagious from four days before to four days after the rash appears. Complications can be serious for infants, pregnant individuals, and people with weakened immune systems.
Vaccination remains key to prevention. “Just one dose of measles vaccine is 93% effective against measles and two doses provides 97% protection,” according to the Arizona Department of Health Services. Vaccines protect individuals and help reduce community spread.
The department advises practical steps to limit transmission: staying home when sick; practicing good hand hygiene; covering coughs and sneezes; keeping vaccinations current; seeking testing and medical care if needed; and being cautious in crowded indoor settings like airports or large gatherings. Those planning international travel should ensure they are immune to measles.
“Flu and measles prevention works best when we look out for one another,” states the Arizona Department of Health Services. “If you feel sick, staying home and limiting contact with others is one of the most effective ways to slow the spread and protect each other.”
The Arizona Department of Health Services operates statewide public health programs from its Phoenix headquarters official website. It offers resources such as data portals for informed decisions and collaborates on initiatives including maternal mortality prevention official website. Jennie Cunico leads the department official website.
For updates on flu activity visit azdhs.gov/flu. For information about measles visit azdhs.gov/measles.
