However, if someone has recently been exposed to certain serious diseases, physicians may recommend an injection of a serum (antitoxin) to give him immediate passive immunity.
Kui keegi on äsja jäänud mõnda tõsisesse haigusesse, võivad arstid soovitada süstida seerumit (antitoksiini), et anda talle kohene passiivne immuunsus.