<p>It is good clinical practice that vaccination should be preceded by a review of the medical history (especially with regard to previous vaccination and possible occurrence of undesirable events) and a clinical examination. Parents/ guardians should be advised to seek medical advice promptly where these signs/symptoms are evident. There is a potential risk for transmission to non-vaccinated contacts. It should be administered with caution to infants with close contacts who are immunodeficient, such as household members with malignancies or who are otherwise immunocompromised or receiving immunosuppressive therapy. Contacts of recent vaccinees should be advised to observe personal hygiene</p>