Meningococcal ACWY vaccine safety surveillance Adolescents Men ACWY Surveillance of 2019 Men ACWY vaccine safety commenced from 1 April 2019. The current reported event rates are consistent with existing data on Men ACWY vaccines and no safety signals have been detected. For more information on how AusVaxSafety conducts active vaccine safety surveillance click here. Last updated 11/12/2020 20,750 Parents/carers responded to an SMS about their child’s health a few days after their MenACWY vaccinations. 94.8% reported no adverse events 94.8% reported no adverse events 5.2% reported any adverse event, including... 0.4% who reported taking their child to a doctor or emergency department in the days after vaccination.The adverse events they reported were similar to the types of adverse events reported overall 1,071 parents/carers reported one or more adverse events. The most commonly reported were: These symptoms are known to occur after vaccination. They are generally mild and short-lived.