Pertussis surveillance in Switzerland, 1992 to 1997 - a large epidemic in 1994. What next?
Cases of whooping cough have been recorded by the Swiss Sentinel Surveillance Network Sentinella (SSSN) since June 1991 to monitor pertussis trends in Switzerland and to assess the current vaccination strategy. The Sentinella network consists of a sampl
Matter
H.C.
HC