A Prospective, Epidemiological Study to Assess the Disease Burden of Respiratory Syncytial Virus Associated, Suspected Lower Respiratory Tract Infections in Newborns, From 0 to 2 Years of Age and Risk of Development of Wheeze and Asthma From 0 to 6 Years of Age

Inclusion Criteria: Before birth: * Subject whose parent(s)/Legally Acceptable Representative(s) (LARs), in the opinion of the investigator, can and will comply with the requirements of the protocol. * Written informed consent (including consent to obtain a cord blood sample at birth) obtained from the parent(s)/LAR(s) of the subject. After Birth: * Subject for whom updated and re-signed informed consent and confirmation of eligibility is available not later than 5 working days after birth. * Cord blood sample collection of at least 3 mL, at birth. For extension period: * Subject is enrolled at a study site that is participating in the extension period follow-up. * Subject whose parent(s)/LAR(s), in the opinion of the investigator, can and will comply with the requirements of the protocol. * Written informed consent (or witnessed thumb printed consent in case of an illiterate subject) obtained from the parent(s)/LAR(s) of the subject. * Previous participation in the primary study (from birth up to the age of 2 years). Exclusion Criteria: Before birth: * Subject expected to become Child in care * Subjects whose parent(s)/LAR(s) are below the age of 18 or the legal consenting age of the respective country if this is higher. After Birth: * Child in care * Newborn with a gestational age of less than 28 weeks. * Subjects with any congenital condition that will require an expected postnatal stay in hospital of more than 12 consecutive weeks. * Subjects with major congeni…