At one point in 2021, there was a playful culture war pitting #teampfizer against #teammoderna, with social media tags eliciting posts of loyalty for which brand of vaccine eager adults received. Fast forward two years and the brand loyalty has faded, herd immunity has taken hold, and staying up to date on your vaccines can be confusing.

The virus is most prevalent in semi-tropical and tropical areas, such as Central and South America, Southeast Asia, and Africa. Tropical diseases could spread more widely in the U.S. as the climate changes.

Travelers may have an additional step at the airport this holiday season. The CDC is expanding its testing of international air travelers for flu, RSV, COVID-19, and other viruses.

Those dealing with cold and flu season are not alone this time of year. Experts describe the fall season as the prime time to see several respiratory illnesses going around.

The CDC found a parasite called Angiostrongylus cantonensis (A. cantonensis) in brown rats from Atlanta. Humans can get infected by consuming snails or other foods that have picked up rat droppings.

With RSV (respiratory syncytial virus) season almost in full swing, medical professionals are urging people to speak to their healthcare providers about getting vaccinated.