Positive COVID-19 Cases in Pregnancy By ...

The number of COVID-19 cases in pregnant women, by vaccination status and month, in Scotland. Based on COPS pregnancy database updated in mid-September 2021, and cases of COVID-19 with date of onset up to 31 August 2021.

For any individual, the specimen date of their first positive viral PCR result is taken as the date of onset of their first episode of COVID-19.
Subsequent positive viral PCR results with specimen date within 90 days of their first positive result are discounted.
If the individual then has a positive viral PCR result with specimen date ≥90 days after their first positive result, this is taken as the date of onset of their second episode of COVID-19.
Subsequent positive viral PCR results with specimen date within 90 days of this second index date are then discounted as for the first episode of COVID, and so on.

COVID-19 is defined as occurring in pregnancy if the date of onset for any episode of infection occurs at any point from the estimated date of conception (date the woman was 2+0 weeks gestation) up to and including the date the pregnancy ended.

Month is based on the date of onset of COVID-19.

Vaccination status is ascertained by linkage to national COVID-19 vaccination data - see the Data sources tab Vaccination status is determined as at the date of onset of COVID-19 Unvaccinated is defined as the woman having had no COVID-19 vaccination prior to the date of onset of COVID-19, or having had one dose of vaccination ≤21 days prior to the date of onset Partially vaccinated is defined as the woman having had one dose of vaccination >21 days prior to the date of onset of COVID-19, or two doses of vaccination with the second dose ≤14 days prior to the date of onset Fully vaccinated is defined as the woman having had two doses of vaccination with the second dose >14 days prior to the date of onset of COVID-19.

The vaccination roll-out in Scotland started on 8th December 2020.