The main investigator phoned the parents when the infants were 10 months old, told them about the study and requested consent to interview the infants' usual paediatricians about their medical history. These included asthma, bronchiolitis, bacterial pneumonia, otitis, laryngitis, fever without obvious cause or weight gain difficulties. Abbreviation SARS-CoV-2 severe acute respiratory syndrome coronavirus 2 COVID-19 has affected pregnant women and their foetuses since the spring 2020. [Extracted from the article]