Only four in 10 health-care workers at York Region hospitals got their flu shot past year, according to the region's public health department. Researchers at the University of Pennsylvania School of Medicine said the H3N2 strain left the vaccine only 20-30 percent effective. But the researchers in Nebraska are working to develop a vaccine that uses ancestral genes from four different strains of the flu to provide long-term protection.
The World Health Organization estimates the flu virus results in 1 billion infections, 3 to 5 million cases of severe disease and 300,000 to 500,000 deaths annually.
Flu season generally begins in the late fall and runs through the winter months.
Conventional vaccines have been shown to be less than 60 percent effective when they're successfully matched to the now circulating strain.
That mutation made the vaccine grown in eggs much less effective. Seasonal flu shots will be available to UO students, faculty and staff on November 9 and 16, from 8 to11 a.m.at the health center.
A nurse vaccinates U.S. President Barack Obama against the H1N1 flu at the White House in 2009. Second, because flu viruses are constantly changing, vaccines are updated annually to keep up with the changing viruses. Scientists are trying various approaches to better match vaccines to multiple viral strains.
Oreo Android 8.0 Beta will soon be available for Samsung gadgets
Samsung calls the program the Samsung Experience 9 .0 beta , referring to its Android-based system previously known as TouchWiz. Two of the best Android smartphones on the market will be betting an update to Android 8.0 Oreo in the not-too-distant future.
The egg method allows for large-scale manufacturing but is unreliable.
Scientific American explains all the medical details very simply - In 2014, the H3N2 virus began wearing a new molecule on one of its surface proteins.
Flu vaccines work by priming the immune system with purified proteins from the outer layer of killed flu viruses.
Flu vaccines aim to protect us by priming our immune systems. That's because current H3N2 viruses "don't grow well in chicken eggs, and it is impossible to grow these viruses in eggs without adaptive mutations", Scott Hensley, Ph.D., an associate professor of microbiology at Penn, said in a statement.
"Our experiments suggest that influenza virus antigens grown in systems other than eggs are more likely to elicit protective antibody responses against H3N2 viruses that are now circulating", Hensley said.