Experimental zoster vaccine effective in adults aged 70+
The new trial involved 13,900 adults age 70 and older. Participants were randomly assigned to receive either two doses of the herpes zoster subunit vaccine (HZ/su) containing recombinant varicella-zoster virus glycoprotein E and the AS01B adjuvant system, or two doses of a placebo.
The researchers found that the experimental vaccine protected 89.8 percent of adults age 70 and up. During a mean follow-up of 3.7 years, only 23 vaccine recipients developed herpes zoster, compared to 223 placebo recipients. There were short-lived side effects, such as pain at the injection site, fatigue, or muscle pain; however, serious adverse events occurred with similar frequencies in the two study groups.
"In our trial, HZ/su was found to reduce the risks of herpes zoster and postherpetic neuralgia among adults 70 years of age or older," the authors write.
The study was funded by GlaxoSmithKline, the developer of HZ/su.
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