It’s respiratory virus season and COVID-19, influenza, respiratory syncytial virus (RSV), and norovirus are out in full force. Here's how the “quademic” began.
Health Care-Associated Infection (HAI)
Influenza A and B are back in a large number of cases. Learn more about why the 2024–2025 season is the worst in 15 years.
RSV has a history of greatly affecting infants and older adults. Learn why the 2024–2025 season raised red flags in both of these groups.
COVID-19 remains a serious player in the 2024–2025 viral lineup. Here’s how it spread and what can be expected next.
Although it’s not a respiratory virus, norovirus is definitely disruptive, and the number of cases doubled in the 2024–2025 season.
H5N1 bird flu jumps from animals to humans and should not be ignored, especially in the case of its 2025 comeback.
Measles was eliminated in 2000, but recent vaccination gaps have caused a wide outbreak.
hMPV is a lesser-known virus, but one that is rising quickly. It has been gaining traction, particularly in the 2024–2025 winter season, but there is currently no specific treatment or vaccine available.
The most common viral infection on the planet, the common cold, is anything but simple.
Mycoplasma pneumoniae cases have spiked, especially in kids under five years of age.
The unusually aggressive spike in viral activity in 2025 can be blamed on the immunity gap as well as a few new strains.
The best defense is still a good offense: vaccines, hygiene, and common-sense prevention can help individuals and communities stay healthy.
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