Table 2.

First-generation vaccine recipients. The table displays the type of vaccine received, and whether it was administered before the official eradication of smallpox, followed by the number of doses administered. If individuals were not immunized before official smallpox eradication, vaccination was obtained for occupational reason. Last column reports whether individuals received an additional dose of third-generation smallpox vaccine.

Participant	Vaccine obtained	Year of first dose	Year of last dose	Number of first-generation vaccine doses	Vaccination rationale	Additional 3rd generation dose obtained? (year)
Participant 1	Lancy Vaxina	2007	2007	1	Occupational	No
Participant 5	n.d	1970	2002	2	Before official smallpox eradication	Yes (2011)
Participant 6	Lancy Vaxina	2007	2007	1	Occupational	No
Participant 9	Berna vaccine	1956	1980	4	Before official smallpox eradication	No
Participant 15	n.d.	1965	1965	1	Before official smallpox eradication	Yes (2016)
Participant 18	Berna vaccine	1969	1969	1	Before official smallpox eradication	Yes (2011)
Participant 21	Lancy Vaxina	2007	2007	1	Occupational	No
Participant 22	n.d.	1976	2005	3	Before official eradication smallpox	No
Participant 23	n.d.	1969	1969	1	Before official eradication smallpox	Yes (2016)
Participant 28	Lancy Vaxina	2004	2004	1	Occupational	Yes (2018)