Table.

Estimated average age-specific annual totals of all parvovirus B19 infections, infections during pregnancy, fetal deaths and cases of hydrops fetalis expected in females aged 15–44 years in England and Wales

The 95% confidence interval for the average annual force of infection was used (0–0·0068) and the risk of fetal death (weeks 1–20) and hydrops fetalis (weeks 9–20) taken as 9% and 2·9% respectively. Mid-1996 age-specific population and maternity estimates were provided by www.statistics.gov.uk