Vaccination
S3, E22: One day at school, Peter and his class are vaccinated for tetanus, but Jumbo is absent that day; some time later, while transplanting a rose bush, Peter and Jumbo scratch their skin with thorns.
S3, E22: One day at school, Peter and his class are vaccinated for tetanus, but Jumbo is absent that day; some time later, while transplanting a rose bush, Peter and Jumbo scratch their skin with thorns.