Sentences with phrase «as vaccine strains»

Not exact matches

Today all new viral strains used to make vaccines must be generated by specific artificial genetic modifications rather than by «breeding,» so as to prevent possible reversion back to a virulent form.

«Even when the vaccine is not a perfect match to the circulating influenza strain, as is the case this year, the vaccine still helps prevent more severe infections if children get sick with the flu,» she says.

«The original strain used as a reference for the vaccine was basically a perfect match to the dominant circulating strain, and the predicted efficacy would have been around 47 percent.

Dr Derek Gatherer of Lancaster University said: «Every year we have a round of flu vaccination, where we choose a recent strain of flu as the vaccine, hoping that it will protect against next year's strains.

As new disease strains continue to develop, and globalization and travel make it easier to pass disease across geographical borders, the ability to whip up huge quantities of effective vaccine is becoming increasingly important.

Scientists contacted by Nature say that basic research on such mutated strains may eventually yield insight relevant to developing pandemic countermeasures such as drugs and vaccines.

Findings from this study of flu vaccines delivered by a small needle intradermally parallel earlier results that found adding a strain of influenza B could improve the effectiveness of a flu vaccine nasal spray and a traditional intramuscular vaccine that is injected as a shot in the arm muscle.

The responses of those given the quadrivalent vaccine were the same as those of volunteers who received the vaccine with two strains of A and the strain of B that matched the B strain in the 2012 - 2013 seasonal flu trivalent vaccine.

They are also angry that the vaccine is based on the original strain of HIV, known as IIIB, which is unlike the strains prevalent in Thailand.

The vaccine was targeted especially toward the virus strain circulating in Thailand, and it may not show the same effectiveness where the virus is different, such as Africa or the U.S. And even the 31.2 percent fewer cases that it resulted in is hardly an ideal preventative strategy.

The vaccines targeted an influenza A H1N1 seasonal flu strain as well as A (H7N9), a virus considered to have the potential to trigger a human pandemic.

Flu vaccine production is always a bit of a gamble, and, unfortunately, the strain the researchers had chosen as a target wasn't the most virulent one roaming the U.S. that year.

Vaccination with the pneumococcal conjugate vaccine - 7 [PCV7 — a vaccine that covers 7 strains (serotypes) of Streptococcus pneumoniae] is linked to overall decreases in the rate of serious infections caused by this bacterium, such as pneumonia and meningitis, referred to as invasive pneumococcal disease (IPD)-RSB-, but small increases in IPD caused by serotypes of Streptococcus pneumoniae not covered by the vaccine (referred to as non-vaccine type IPD), according to a study published in PLOS Medicine this week.

«From a pandemic - preparedness point of view, we should potentially start including some of these H3 strains as part of influenza vaccines.»

This means that when an unexpected flu strain appears, such as the 2009 pandemic - causing H1N1 virus, there is no way to rapidly produce a vaccine against it.

As a final confirmation of the compound's potential to stop a virus from spreading, they tested it against an actual virus: the nonpathogenic vaccine strain of the Junin virus.

Current vaccines, which require experts to pick the flu strains that they believe are going to circulate in a given year, are typically 40 to 70 percent effective in the U.S., though in some years protection is as low as 20 percent.

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.

Our team proposes using the strains containing all the identified evolutionary markers as vaccine candidates for upcoming influenza seasons,» Kainov continues.

If the vaccine is not a good match for the virus — as is the case with the H5N1 strain now sweeping Asia — it can still replicate but most animals do not show signs of disease.

And even if they were more dangerous than common flu strains, it would not make any difference because manufacturers kill the virus as part of the vaccine production process, notes the group.

Early tests of a gp120 vaccine looked promising, but optimism faded by the early 1990s as researchers learned the vaccine only worked against strains of HIV that had adapted to conditions in the laboratory.

However, Acambis's Thomas Monath points out that the vehicle strain used by Acambis has been used safely and effectively as a vaccine against yellow fever for decades, whereas the dengue chimera's safety is comparatively untested.

But he cautions that the cocktail of proteins that make up the vaccine might need to be updated as new disease - causing strains of GBS emerge.

The best strains we have for a H1N1 swine flu vaccine grow only as half as fast as ordinary vaccine viruses, meaning poorer nations may not get it in time if there is a second wave

As anyone who's gotten sick despite a flu shot knows, a vaccine that protects against one strain of a pathogen doesn't necessarily protect against the others.

Hepatitis B virus, meanwhile, has already produced mutant strains accepted as being vaccine - induced.

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.

So, due to natural changes in the virus as it evolves, as well as due to mutations that may be caused by growing the vaccine strain, the circulating virus and the vaccine become less well matched over time.

Finally, MAIT cells are activated in human volunteers receiving an attenuated strain of Shigella dysenteriae - 1 tested as a potential vaccine.

For mouse strain specificity, Balb / c mice were included for consistency between experiments; C57BL / 6 mice were given the same vaccines and dosages as Balb / c mice for comparison as C57BL / 6 mice do not exhibit a bias for Th2 immunologic responses as do Balb / c mice [37]--[39].

An experimental vaccine poised to win World Health Organization approval as the first to even partially protect children against malaria works better against one strain of the disease - causing parasite than others.

There are many variations of H1N1, says Rafi Ahmed, director of the Emory Vaccine Center and a Georgia Research Alliance Eminent Scholar, but this technology could be used to identify a very specific strain, such as the one weâ $ ™ re dealing with in the current pandemic.

What can you do when there's an epidemic of flu sweeping the country and the CDC has warned that the flu vaccine may not be as effective as in other years for this year's strain of the virus?

Introducing the Gardasil vaccine Gardasil, the HPV vaccine introduced in 2006, protects against the two strains of the virus that are most likely to cause cancer, as well as the two strains of the virus that are the culprits in most cases of genital warts.

In addition, the vaccine may still offer some protection against the mutated strain — meaning that if you do get it, your flu symptoms may not be as severe.

There are many different strains of the FIV virus and it is not entirely clear as of yet how well the available vaccine protects against all these different strains, but studies suggests that it is able to provide a valuable degree of protection for cats at risk of exposure.

It's the vaccine developers» best guess as to whether or not the current infective organisms are the same strain as the vaccine, a process similar to what happens the human flu vaccines.

Vaccines for parainfluenza and the two strains of leptospirosis aren't classified as essential for your pooch's health, although your vet may recommend them for your pup.

«Vaccines that contain outdated strains of influenza may provide only partial clinical protection, and may result in nasal shedding of the virus, oftentimes as much as an unvaccinated horse, thus putting other horses at risk.»

As with human flu shots, a vaccine for one strain doesn't help prevent another strain.

Fluvac Innovator ® vaccines are the most trusted equine influenza vaccines and help provide your horse with broad protection against newly emerging and conventional equine influenza virus strains as well as equine herpesvirus (EHV 1 and EHV 4).4 - 10 Zoetis regularly tests Fluvac Innovator to ensure its vaccine continues to be effective against emerging EIV isolates.

Regular canine vaccines, such as a 5 in 1, or a 7 in 1, offer some protection against kennel cough, as many strains of this infection, are caused by the parainfluenza virus.

There is some cross-protection for the H3N8 strain provided by the H3N2 vaccine, and vise versa, but not as much as we'd like.

Make an appointment at a Planned Parenthood health center to receive education about HPV, as well as the preventive vaccine, Gardasil, which protects against two cancer - causing strains of the virus.