However , this may also affect policy planning for a biological attack with a disease such as smallpox .
Even small reductions in the contact rate can be important , especially for diseases like influenza or severe acute respiratory syndrome ( SARS ) .
This may also affect policy planning for a biological attack with a disease such as smallpox .
Even small reductions in the contact rate can be important , especially for diseases like influenza or severe acute respiratory syndrome ( SARS ) .