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Table 1 Reported estimates of R0 for smallpox

From: Extracting key information from historical data to quantify the transmission dynamics of smallpox

Location

R 0

Range (min, max)

Assumptions

Unspecified [68, 69]

5.0

-

Calculated from proposed goal of vaccination coverage

Abakaliki, Nigeria, 1967 [67]

1.1

(1.0, 1.2)‡

Population mixes randomly, initially fully susceptible

Various outbreaks in Europe and the US, 18–20th centuries [66]

3.5–6.0

(3.4, 10.8)

Population mixes randomly, initially fully susceptible

Paris, 17th century [53]

6.7

-

Population is fully susceptible at birth

Abakaliki, Nigeria, 1967 [18]

6.9

(4.5, 10.1)‡

Initially partially immune, heterogeneous mixing

  1. ‡The ranges for the outbreak in Abakaliki are 95% confidence intervals.