Why there's no blanket recommendation on COVID-19 vaccination in pregnancy Those who are pregnant or breastfeeding will have to weigh their own risks when deciding whether to be vaccinated to protect against COVID-19 because it hasn't been studied in clinical trials, Canadian doctors say. Social Sharing CBC News · Posted: Dec 18, 2020 4:00 AM ET | Last Updated: December 18, 2020 Macarena Giron, dancer and teacher of Creative Dance and performance , eight months pregnant, is seen teaching online at home with her daughter Olivia during lockdown in April in Madrid, Spain. How coronavirus vaccines might affect pregnancy and breastfeeding hasn't been fully studied.(La Jara Center via Getty Images)