Dr. Not Yet Dr. Ag said:
So many anecdotes. I take care of more flu negative fever/cough patients than actual flu positive patients every single year. Just because you or your family had a viral infection in Dec or Jan does not give evidence to CV being here in November. The early flu spike in Washington this year was due to the flu hitting earlier this year than it typically hits. We in healthcare knew about this early flu season due to data out of Australia.
It is also important to note that the rapid flu test has a false negative rate of 20-30%, meaning lots of these flu negative cases you are talking about were actually flu positive.
Is it possible that we had CV in the US as early as November? Sure, but unlikely. CV is virulent enough that if we had a large spike in flu negative hypoxic respiratory failure patients in an area, the CDC would have sent out a memo on it as they typically do each year when abnormal spikes in infection related cases happens.
My sons fell in the category of a negative test attributed to early Doc visit. We go the minute we see fever because we have a T1D in the house. We get tamiflu as early as possible and they'll give it to us with flu symptoms even if test is negative.
What led us to believe it could have been CV is that the Tamiflu did absolutely nothing. Son with most severe systems had flu shot and tamiflu on board within hours of fever onset. He went on to have 102-105 fever for five straight days (with fever reducers). On the follow up visit our Pediatrician threw her hands in the air and said it might be adenovirus.