Why aspirin is contraindicated in persons with varicella infection??
People should avoid using salicylates for 6 weeks after getting varicella vaccine. This is because of the association between aspirin use and Reye syndrome following varicella, and also the potential risk of Reye syndrome if a person is given aspirin after varicella vaccination. From https://www.cdc.gov/vaccines/vpd-vac/varicella/hcp-contraindications.htm