# Herpes zoster prevention and vaccine benefits > Live situation record from CLSTR: https://clstr.news/situations/herpes-zoster-prevention-and-vaccine-benefits > Updated: 2026-08-13T21:58:46.000Z. Sources: 7. Developments: 2. Research and medical guidance regarding the prevention and risks of herpes zoster (shingles) have highlighted both the efficacy of vaccination and its potential secondary health benefits. A study conducted in New Zealand involving over 278,000 adults suggests that the shingles vaccine may offer cardiovascular and cerebrovascular protection. Findings indicated that hospital admissions for heart attacks and strokes decreased by approximately 50% during the first six weeks following vaccination. This follows similar observations in Australia regarding stroke risk reduction in seniors. Medical experts note that shingles is caused by the reactivation of the varicella-zoster virus, which can lead to intense pain, rashes, and complications such as postherpetic neuralgia. While vaccination can reduce risk by up to 97%, access to the vaccine varies globally. For instance, in Brazil, the vaccine is primarily available through private clinics rather than the public health system. ## Timeline ### 2026-08-13: Herpes zoster risks and prevention through vaccination Herpes zoster is caused by the reactivation of the chickenpox virus. Vaccination is highly effective for preventing the disease, especially in adults over 50 or those with weakened immune systems. 4 sources. https://clstr.news/cluster/herpes-zoster-risks-and-prevention-through-vaccination ### 2026-08-09: Shingles vaccine may reduce heart attack and stroke risks Research indicates the shingles vaccine may reduce the risk of heart attack and stroke by approximately 50% in the weeks following vaccination, potentially offering benefits beyond infection prevention. 3 sources. https://clstr.news/cluster/shingles-vaccine-may-reduce-heart-attack-and-stroke-risks --- Cite as: Herpes zoster prevention and vaccine benefits. CLSTR, https://clstr.news/situations/herpes-zoster-prevention-and-vaccine-benefits