Waning MMR immunity, vaccine hesitancy, could mean more measles outbreaksA systematic review and meta-analysis of 62 studies has found that immunity conferred by the measles, mumps, and rubella (MMR) vaccine fades each subsequent year, suggesting that vaccination strategies should be revisited. The decreases in immunity could help explain continued measles outbreaks even in countries with high vaccine coverage, the authors said. In addition, vaccine hesitancy has led to lower MMR vaccine uptake in the past 10 years, and a further drop is anticipated owing to COVID-19, meaning that vaccine-preventable diseases could well rise. "In particular, health-care workers should ensure that they correctly communicate the effectiveness of the MMR vaccine to the general population." Sep 1 OIE report on H5 in RussiaElsewhere, Taiwan recently reported another outbreak involving highly pathogenic H5N5 avian flu.