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Studies conducted since the 1990s on the duration of protection induced by the whole-cell pertussis vaccine (wP).
| Author | Year | Subjects | Estimated duration of protection (years) |
Country |
|---|---|---|---|---|
| CDC [24] | 1993 | 225 | 4-6 | USA (Massachusetts) |
| Ramsay [25] | 1993 | 3,150 | 8 | UK |
| Nielsen & Larsen [26] | 1994 | Not known | 10 | Denmark |
| He [27] | 1996 | 3,794 | 5-10 | Finland |
| Van Buynder [28] | 1999 | 15,286 | 5-14 | UK |
| Torvaldsen [29] | 2003 | Not known | 6-9 | Australia |
From Wendelboe AM et al., 2015 [23], mod.
