Vzv sentence example
T-cell immunity is known to be important in maintaining VZV in a latent state.
It has been conclusively proven that another herpes virus-varicella zoster virus (VZV), the cause of both chickenpox and shingles-is the culprit for Ramsey-Hunt syndrome.
Chickenpox vaccine or varicella zoster vaccine (VZV) is an injection that protects children from contracting chickenpox (varicella), one of the most common childhood diseases.
Prior to the introduction of VZV, approximately 4 million Americans contracted chickenpox each year, and 95 percent of children contracted the disease before the age of 18.
By 2002, some 81 percent of American children had been vaccinated with VZV, and the CDC determined that the number of chickenpox cases had declined substantially.Advertisement
This, in turn, will reduce the incidence of chickenpox among those who cannot receive VZV, including children who are most at risk for serious complications from the disease.
As of 2004 it was unclear whether VZV provided life-long immunity to chickenpox.
The U.S. Food and Drug Administration (FDA) required Merck to follow several thousand children for 15 years, to determine the long-term effects of the vaccine and whether additional booster shots of VZV would be necessary.
It is not known whether the weakened virus used for VZV can remain dormant in the body, eventually causing shingles in the same way that the naturally occurring varicella virus can.
In 1998 the CDC found 2.6 cases of post-vaccination herpes zoster for every 100,000 distributed doses of VZV.Advertisement
Prior to the introduction of VZV, there were about 100 deaths and 12,000 hospitalizations annually as a result of chickenpox infections.
The CDC estimates that, including direct medical costs and indirect societal costs, $5.40 is saved for every $1.00 spent on childhood VZV immunization.
In addition, infants under one year and pregnant teenagers should not receive VZV.
Females should not become pregnant within one month of receiving VZV.
Moreover, children with weakened immune systems should not receive a live virus vaccine such as VZV.Advertisement
Children with leukemia in remission or HIV-infected children with normal immune function may be eligible for VZV.
Other reactions, such as a low blood count or brain involvement, including encephalitis, occur so rarely that they may not be associated with VZV.
Following the distribution of the first 10 million doses of VZV, it was determined that severe reactions occurred with a frequency of approximately one in 50,000.
There is no evidence that healthy children who have had chickenpox or who received VZV previously are at a greater for adverse effects from an additional dose of Varivax.