"Seasonal flu" refers to the flu that occurs during specific times of the year, usually during colder months. It is a type of flu that happens every year and affects many people worldwide.
Full definition
The researchers followed the DNA injection with a traditional
seasonal flu shot, which contains dead viruses.
Until now, it was widely believed that in order
for seasonal flu to escape the immunity individuals acquire from previous infections or vaccinations, it would take at least four amino acid substitutions.
Remember, this is not quite
like seasonal flu, because it's killing younger people, and it does have an impact on health care systems.
They found that
seasonal flu escapes immunity and develops into new strains typically by just a single amino acid substitution.
But existing vaccines protect against just the
dominant seasonal flu strain and not emerging flu strains.
Unlike seasonal flu, this form of influenza was highly dangerous to young, otherwise healthy adults.
This raises concerns that
seasonal flu vaccine, which some companies are still making, may be useless when the northern hemisphere's flu season arrives later this year.
The Health Department emphasizes that there is no shortage
of seasonal flu vaccine in Oneida County.
Canine H3N2 influenza virus is different than the human H3N2 influenza virus that is a common
seasonal flu virus in people.
Reports of extra encephalitis during outbreaks of
seasonal flu in Japan and the US, and most recently of swine flu - infected children hospitalised with neurological symptoms in Dallas, Texas, hint at a related mechanism, however.
As
with seasonal flu, infections tapered off during the summer of 2013 but reappeared with colder weather.
After 1919, the descendants of the H1N1 virus continue to circulate and
cause seasonal flu outbreaks in humans — and pigs.
«Each year between 3,000 and 49,000 people in the United States die as the result of seasonal influenza and its complications,» said NIAID Director Anthony S. Fauci., M.D. «Annual vaccination
against seasonal flu continues to be the most effective way to protect against infection, and this new study provides some interesting clues about how we might improve the level of protection that flu vaccines provide.»
October 25, 2017 Flu forecasting tool uses evolution to make earlier predictions A new model for forecasting
seasonal flu outbreaks makes better predictions by factoring in how much the virus changed compared to recent years.
Bruce Gellin, director of the National Vaccine Program Office, added that he has «high expectations» that the shots will work without adjuvants,
as seasonal flu vaccines do.
The authors highlight an intriguing finding, which was that the level of antibody tinkering — known as somatic hypermutation — did not increase in volunteers» B cells over time after
seasonal flu immunization.
Last week BMJ questioned this policy, stating a new analysis undermined the evidence that the drug can fight bacterial complications of
ordinary seasonal flu.
Like many influenza virologists, John Steel of Emory University in Atlanta often uses a feeble lab strain of influenza in his studies of
how seasonal flu spreads.
In addition to growth problems with the virus, Hall noted that one vaccine maker is still
making seasonal flu vaccine and has yet to switch over to production of the novel H1N1 product.
In the southern hemisphere, where it is winter, swine flu apparently replaces the
usual seasonal flu.
Normal seasonal flu outbreaks have only one peak of infection — the number of cases starts very low, increases to a maximum, then decreases to a very low level, and remains at a low level until the next flu season.
Either approach will take at least another five years of testing before it would be ready to
fight seasonal flu, Nabel says.
This could mean incorporating a swine flu vaccine into the
annual seasonal flu vaccine already in production, he said.
If it's because of the panic surrounding the swine flu, he recommends looking at the facts: In the United States,
seasonal flu kills tens of thousands more people every year than swine flu has so far in 2009.
December 10, 2012 — Scientists were able to
forecast seasonal flu outbreaks using an approach common to weather prediction.
A team of scientists from the U.S. and China now say they have designed a vaccine that could take the guesswork out of
seasonal flu protection by boosting the immune system's capacity to combat many viral strains.
Still, «whether it will be sufficient without having other proteins in there, I'm not sure,» Monto says, referring to a possible need to
use seasonal flu vaccines as supplements.
The researchers picked the H1 and H3 subtypes because they have been the major cause of
human seasonal flu outbreaks since 1918.
The nightly news reports about the
brutal seasonal flu, now widespread across our great land, haven't jumpstarted efforts to build (and fund) such a plan.
In addition to following World Health Organization and CDC directives they need to educate their employees about which demographics are the most at risk, gather information from their local health department and nearby businesses, provide vaccines — which are available for
seasonal flu now, but won't be out for H1N1 until mid-October — and perhaps most importantly, have a clear leave policy.
The latest report by Public Health England
showed seasonal flu levels remain high but are continuing to stabilise across the UK.
But that's not because it will cause devastation — most health experts anticipate that this flu will be similar to (or even milder than)
regular seasonal flu.
To find out what impact this might have on a flu epidemic, Earn and his colleagues turned to a 1982 study which showed that ferrets, a common animal model for human flu, produced
more seasonal flu virus if their fevers were lowered either with painkillers or by having their fur shaved off.
A universal flu vaccine would prevent such a threat: like some childhood shots, it would confer lifelong protection — and eliminate
seasonal flu injections as well.
This suggests that the pandemic virus will displace the two
previous seasonal flu strains, as previous pandemics have done.
Phrases with «seasonal flu»