1. Healthy women =18 years of age who are between 13 0/7 and 34 0/7 weeks’ gestation on the day of planned vaccination, with an uncomplicated, singleton pregnancy, who are at no known increased risk for obstetric complications 2. Able and willing (in the investigator’s opinion) to comply with all study requirements 3. Willing to allow the investigators to discuss the volunteer’s medical history with their General Practitioner and access all medical records when relevant to study procedures 4. Willing and able to give informed consent prior to study enrolment 5. No contraindication to the specific vaccine to be administered in the study, according to the Green Book

1. Healthy women =18 years of age who are between 13 0/7 and 34 0/7 weeks’ gestation on the day of planned vaccination, with an uncomplicated, singleton pregnancy, who are at no known increased risk for obstetric complications 2. Able and willing (in the investigator’s opinion) to comply with all study requirements 3. Willing to allow the investigators to discuss the volunteer’s medical history with their General Practitioner and access all medical records when relevant to study procedures 4. Willing and able to give informed consent prior to study enrolment 5. No contraindication to the specific vaccine to be administered in the study, according to the Green Book