Respiratory Viral Isolates in Southern California

INFLUENZA!

Influenza is on the RISE and RSV remains steady with only a slight decrease over the past week. We are still seeing >10% of specimens positive (endemic levels), much later a season than last year. As for influenza, a very late and relatively mild season but we are seeing increasing numbers of Influenza A (mostly 2009 H1N1) and some Influenza B. Human metapneumovirus, so strong over the past few weeks is decreasing in numbers. Stay tuned.

RSV Activity in Southern California

RSV and Influenza A running neck and neck!

So FINALLY we have seen the arrival of influenza A and RSV close at its heels!
The number of RSV positives equaled the number of influenza A isolates in Southern California last week (at least at our testing sites-usually sicker kids given that this does not include those rapid tests done in offices!)
The influenza we are seeing is primarily influenza A and a mix of H3 and H1N1. We also have seen some influenza B circulating.
So far, the strains we are seeing are those contained in the seasonal vaccine. It's NOT TOO late to vaccinate. We are having a late season!

RSV in Southern California

Respiratory Viral Activity

Respiratory Viral Activity

RSV Activity in Southern California