Female population older than 18 years. Ability to provide informed consent. Being vaccinated with a COVID-19 vaccine. Intend to be available for follow-up visits through one year postvaccination. Influenza and pertussis vaccination during pregnancy (as per Belgian recommendations) is allowed.

Female population older than 18 years. Ability to provide informed consent. Being vaccinated with a COVID-19 vaccine. Intend to be available for follow-up visits through one year postvaccination. Influenza and pertussis vaccination during pregnancy (as per Belgian recommendations) is allowed.