Sentences with phrase «live vaccine strains»

Hybridising between live vaccine strains, or a live vaccine and wild viruses, is less predictable.

Not exact matches

The scientists believe that because they included eight mutations in their lab - made viral strain, it is unlikely the virus will revert back to its original, more dangerous form (a common concern with any live - virus vaccine).

Both vaccines were based on live, weakened strains of polio virus grown in monkeys» kidney cells.

In addition, vaccine - makers that use eggs can not begin developing new vaccines that target new virus strains until the U.S. Centers for Disease Control and Prevention (CDC) creates a live - virus reference strain for these companies to work with, a process that could take several weeks.

He worries that a live vaccine that uses Vibrio strains whose virulence genes have been removed may still be capable of getting new virulence genes through its integron.

Then they began using a third live vaccine containing a European strain.

Chicken farmers in Australia were using two live vaccines, both made from Australian viral strains, against a poultry disease called infectious laryngotracheitis (ILT).

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.

Because Ebola is so deadly, creating a conventional vaccine of inactivated whole virus, or a live weakened strain is thought too far too dangerous.

But two new strains of a nasty poultry disease that have been plaguing chickens in Australia since 2008 have been found to be hybrids of viruses from live vaccines.

They then began using a third live vaccine containing a European strain.

«This work shows that with live vaccines, we need to pay attention to the evolution of the vaccine strains themselves,» says Andrew Read at the University of Pittsburgh in University Park, an expert in pathogen evolution who was not involved in the research.

GMT for the BPV vaccine and live virus were not different for the two strains p >.05.

However, they said the development of the vaccine was timely, amid concerns the H5N1 bird flu strain circulating in south east Asia could mutate into a pandemic strain which would put millions of lives at risk.

Even though the flu vaccine was only 25 percent effective against the severe H3N2 strain that caused the most illness, the vaccine could have been even less effective and still saved tens of thousands of lives, the researchers said.

The vaccine can contain one of two things, a living, non-harmful strain of the bacteria or virus that you're safeguarding against or a nonliving, inactive version that can replicate itself in the body.

The FIV vaccine is one that will cause the cat to test positive for the rest of its life, but doesn't offer immunity to all strains of the virus so we don't recommend giving it.

Distemper vaccine reactions can also involve neurological signs, especially if the vaccine contains modified live virus — the Rockborn strain of virus — that is known to produce post-vaccinal encephalitis.