Adenylate cyclase toxin-hemolysin (CyaA) relevance for pertussis vaccines Peter Sebo*, Radim Osicka and Jiri Masin Institute of Microbiology, Academy of Sciences of the Czech Republic, v.v.i., Videnska 1083, 142 20, Prague 4, Czech Republic *Author for correspondence: Dr. Peter Sebo Tel.: +420 241 062 762 Fax.: +420 241 062 152 sebo@biomed.cas.cz .