Sentences with phrase «from circulating strains»

Not exact matches

In 1980 Fiers first sequenced the gene for hemagglutinin derived from the human influenza strain H3N2 that circulated in 1965.

«There were a couple of these in the vaccine strain the past two seasons that wound up making it a little bit different from the actual circulating virus strain.»

The study also confirms that the «H1» hemagluttinin protein of the new virus derives from the classical swine H1N1 strain, which shares a close common ancestor with the human H1N1 strain circulating before 1957 and several lines of evidence show that older people exposed to that virus may have some immunity to the new H1N1.

The authors confirm that the new strain is comprised of segments from swine flu strains known to circulate in Europe, Asia and North America, but that this combination has not previously been seen and appears to have been evolving independently from its parent strains for some time.

They tested a strain of Zika virus currently circulating in human populations in the Americas and another from Africa, which is the original strain identified in 1947.

«It was not known whether any of these vaccines could provide protection against the new outbreak West African Makona strain of Ebola Zaire currently circulating in Guinea,» said John Eldridge, Chief Scientific Officer - Vaccines at Profectus Biosciences, Inc. «Our findings show that our candidate vaccines provided complete, single dose protection from a lethal amount of the Makona strain of Ebola virus.»

In this case, researchers from the Icahn School of Medicine at Mount Sinai in New York City took tops from two flu strains that circulate only in birds, and connected each one to a human hemagglutinin stalk.

The researchers are taking hemagglutinin mutations from every flu strain that has ever circulated, dumping them into a kind of scientific blender and attaching them to particles that can form the basis of a vaccine.

For the new study, researchers in Diamond's laboratory, led by first author Helen Lazear, PhD, now at the University of North Carolina at Chapel Hill, tested five strains of the Zika virus in the mice: the original strain acquired from Uganda in 1947; three strains that circulated in Senegal in the 1980s; and the French Polynesian strain, which caused infections in 2013 and is nearly identical to the strain causing the current outbreak.

«Most of what we know about Enterococcus comes from the few strains circulating in the hospital,» says Lebreton.

The findings, which appear in the March 11 issue of Cell Host & Microbe, contradict previous reports from Indian health officials that the strain has not changed from the version of H1N1 that emerged in 2009 and has been circulating around the world ever since.

These rare VDPVs arise when a virus used in the live vaccine reverts from its weakened form and regains its virulence — a danger when vaccination rates are low, as they are in both places, allowing the vaccine strain to circulate and accumulate genetic mutations.

Called a DNA vaccine, it contains genetic snippets from a Zika virus strain that circulated recently in Brazil to elicit immune responses.

What is more, the DNA in Haiti's cholera shows it was a single, recent introduction of a strain from south Asia, though we don't know if it is circulating in Nepal.

The strain likely resulted from a reshuffling of several avian influenza viruses circulating in domestic ducks and chickens, Guan's group reported in 2013.

The virus strains» family trees suggested that flu always circulates locally in east Asia before emerging from this crucible for its global excursions.

The virus itself will continue to mutate from year to year — a process referred to as antigenic drift — and over time it becomes less well matched to the vaccine strain, meaning that the antibodies you generate from getting the vaccine may be less effective in neutralizing the circulating virus.

From the American Veterinary Medical Association: It was recently brought to our attention that there are rumors circulating online about the existence of two new strains of canine distemper virus.