According to a new study conducted in the US and published in JAMA Network Open, pregnant women who received one of the mRNA Covid-19 vaccines, had 10-fold higher antibody concentrations than those who were naturally infected with Covid virus, a finding that was also observed in their babies.

The study by researchers at Children's Hospital of Philadelphia (CHOP) and the University of Pennsylvania in the US, also found that vaccine timing played an important role in maximising the transfer of antibodies, with antibodies detected as early as 15 days after the first vaccine dose and increasing for several weeks after.