Dormant Virus May Reactivate Decades Later, Warns UKHSA Friday, February 27, 2026 virus shingles chickenpox ukhsa health virusdormancy vaccination nhs immunization publichealth The UK Health Security Agency (UKHSA) has highlighted an important health issue: the virus causing chickenpox can stay dormant in the body for years and reactivate later in life, leading to shingles—a painful condition … Read More