Seasonal flu is currently the most common virus detected in China's illness surge, which is at expected levels for this time of year.
Further tests found seasonal flu, rhinovirus, COVID, and other common respiratory viruses, alongside malaria and complications from malnutrition.
RSV activity remains high, with pediatric hospitalizations increasing across most of the country.
The WHO says it is monitoring some JN.1-related variants, still in low proportions, that might have more immune escape than XEC.
The report urges citizens and healthcare workers not yet vaccinated against COVID-19 or seasonal flu to do so as soon as possible before next week's holidays.
Socially vulnerable patients had higher rates of respiratory support, mainly due to socioeconomic status and household composition and disability.
In its weekly respiratory illness snapshot, the CDC upgraded the level from low to moderate.
But the risk of bacterial infections in COVID-19 patients was substantially elevated after 48 hours compared with the other viruses.
In its annual National Influenza Vaccination Week messaging the CDC said there's still time to benefit from getting a flu shot this season.
As flu test positivity crept upward, emergency department visits increased slightly among children and adolescents.
Meanwhile, COVID activity remained low amid a shift in variant proportions and RSV levels rose in 3 US regions.
The average time between discharge and death was 9 days.
Though the KP.3.1.1 variant is still dominant, levels of the newer XEC variant continue to rise.
The CDC said the rise in M pneumoniae in children ages 2 to 4 is notable, because it isn't typically known as a leading cause of pneumonia in the age-group.
CDC wastewater tracking shows SARS-CoV-2 detections are now at the low level nationally.
The test joins other over-the-counter COVID-19/flu tests already available under emergency use authorization.
Though KP.3.1.1 variant levels continue to rise, the proportion of XEC viruses is also trending upward.
Wastewater levels for COVID-19 remain high but are low for RSV and influenza.
For all children in the study, advanced maternal age, gestational high blood pressure, cesarean delivery, and being a boy were associated with increased risk of seizures.
Most of the kids who died were unvaccinated, and about half had no underlying health conditions.
Dominant flu strain varied by subregion, and a few countries, such as Chile and Zambia, reported very high activity.
Relative vaccine effectiveness was higher for the adjuvanted flu vaccine among older adults with multiple concurrent high-risk conditions.
A single-center study found 86% of infants diagnosed with influenza from 2012 through 2019 received the antiviral, as recommended by national guidelines.
COVID test positivity, emergency department visits, hospitalizations, and deaths are are on the rise, but remain at low levels.
The Netherlands had the most detections.