Reinfections with RSV after the initial episode may occur but typically aren't as severe.
The ScanaFlu can test for Strep A, Influenza A, Influenza B, Adenovirus and RSV.
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Previous studies have shown a link between repeated lung infections with RSV and developing asthma later in life.
One Swedish study showed showed 39% of infants taken to hospital with RSV had asthma when they were 18.
But researchers believe it could determine how a baby responds to RSV infection, and how serious the disease is likely to be.
They showed infections by respiratory syncytial virus (RSV) stripped immune cells of their ability to calm down inflammation in the lung's airways.
With no official reporting of RSV, year-to-year comparisons are difficult to gauge except to say spikes are typical this time of year.
The AAP shrank the pool of infants deemed at risk for RSV and lowered the maximum time for treatment from five months to three.
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The scientists said the findings suggested that RSV was a "hit and hide virus", which means it can lurk in the body before striking again.
BBC: RSV infects most babies within their first year of life
Subsequent RSV infections usually are not as severe as the first.
In Boston, a city hit hard by the flu, Massachusetts General Hospital has more than 175 cases of RSV on the record so far this season.
The scientists infected mice with the human strain of RSV.
BBC: RSV infects most babies within their first year of life
"These studies show that RSV is a 'hit and hide' virus, rather like HIV or some hepatitis viruses, " said Professor Peter Openshaw of Imperial College and one of those involved in the study.
BBC: RSV infects most babies within their first year of life
At the three pediatric hospitals that make up Children's Heathcare of Atlanta, some 545 youngsters have been treated for RSV since the beginning of December, according to the group's clinical microbiologist, Dr. Robert Jerris.
RSV, which generally circulates from late fall into the early spring, is out there with a myriad of other stuff floating around right now: Human metapneumovirus (hMPV), adenovirus and parainfluenza, all common respiratory viruses, and pertussis, the bacterial disease that causes whooping cough.
For instance, the American Association of Pediatrics recently changed its recommendations for the treatment of respiratory syncytial virus (RSV), a potentially deadly respiratory infection that afflicts half of all infants during their first year of life and almost all by the end of year two.
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