Prior to the introduction of the vaccine in 1995 in the United States (released in 1988 in Japan and Korea), there were around 4,000,000 cases per year in the United States, mostly children, with typically 10,500–13,000 hospital admissions (range, 8,000–18,000), and 100–150 deaths each year. Though mostly children caught it, the majority of deaths (by as much as 80%) were among adults.
During 2003 and the first half of 2004, the US Centers for Disease Control and Prevention (CDC) reported eight deaths from varicella, six of whom were children or adolescents. These deaths and hospital admissions have substantially declined in the US due to vaccination, though the rate of shingles infection has increased as adults are less exposed to infected children (which would otherwise help protect against shingles). Ten years after the vaccine was recommended in the US, the CDC reported as much as a 90% drop in chickenpox cases, a varicella-related hospital admission decline of 71% and a 97% drop in chickenpox deaths among those under 20.
Vaccines are less effective among high-risk patients, as well as being more dangerous because they contain attenuated live virus. In a study performed on children with an impaired immune system, 30% had lost the antibody after five years, and 8% had already caught wild chickenpox in that five-year period.
Looking for ideal Biopharmaceutical Long Validity Biological Manufacturer & supplier ? We have a wide selection at great prices to help you get creative. All the Biopharmaceutical Long Validity Finished Products
are quality guaranteed. We are China Origin Factory of Biopharmaceutical Lyophilized Vaccination. If you have any question, please feel free to contact us.
Product Categories : Varicella Vaccine(Live) > Finished Products