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Table 1 Vaccination history of different countries

From: Changes in the genomic content of circulating Bordetella pertussis strains isolated from the Netherlands, Sweden, Japan and Australia: adaptive evolution or drift?

Country Period Comment Year of Isolation Number of strains
Netherlands NV vaccine strains   2
Netherlands N1 pre-vaccination period 1949-1953 11
Netherlands N2 Early post vaccine WCV 1953-1964 5
Netherlands N3 late post vaccine WCV 1965-1975 6
Netherlands N4 vaccine dose reduction period 1976-1984 16
Netherlands N5 post vaccine dose reduction period 1985-1992 15
Netherlands N6 Epidemic 1993-2004 31
Netherlands N7 Early post ACV 2005-2008 18
Sweden Sw1 Post WCV 1953-1978 5
Sweden Sw2 Vaccine free period 1979-1996 7
Sweden Sw3 Post ACV 1997-2008 8
Japan J1 Post WCV 1949-1981 1
Japan J2 Post ACV 1982-2008 7
Australia A1 Post WCV 1950-1998 15
Australia A2 Post ACV 1999-2008 -
Senegal Se1 Vaccine free period until 1987 -
Senegal Se2 Early post WCV 1988-2008 10
Kenya K1 Vaccine free period until 2008 13
   Reference strain, Tohama I   1