Skip to contents

Hepatitis A serological data from Bulgaria in 1964 (aggregated)

Source: R/data.R
hav_bg_1964.Rd

A cross-sectional survey conducted in 1964 in Bulgaria. Samples were collected from schoolchildren and blood donors.

Usage

hav_bg_1964

Format

A data frame with 3 variables:

age

Age group

pos

Number of seropositive individuals

tot

Total number of individuals surveyed

Source

Keiding, Niels. "Age-Specific Incidence and Prevalence: A Statistical Perspective." Journal of the Royal Statistical Society. Series A (Statistics in Society) 154, no. 3 (1991): 371-412. doi:10.2307/2983150

Examples

with(
  hav_bg_1964,
  plot(
    age, pos / tot,
    pty = "s", cex = 0.6 * sqrt(tot), pch = 16, xlab = "age",
    ylab = "seroprevalence", xlim = c(0, 86), ylim = c(0, 1)
  )
)