[Ed. – Plus, the Delta variant increases the risk of COVID-19 for pregnant women. The existing vaccines would not be fully reliable remedies for that, based on performance against Delta so far. Look at the timeframe of the studied sample: the majority of childbearing-age women who were unvaccinated would have been so because the vaccine wasn’t available to them until May 2021.]
Doctors studied 1,515 pregnant women with COVID-19 who received care from a large public health system in Dallas from May 2020 through Sept. 4, 2021. Overall, 82 women – 81 of whom were unvaccinated – developed severe illness, including 10 who needed ventilators and two who died.
Pfizer/BioNTech vaccine antibodies disappear in many by 7 months
Six months after receiving the second dose of the two-shot vaccine from Pfizer Inc and BioNTech SE, many recipients no longer have vaccine-induced antibodies that can immediately neutralize worrisome variants of the coronavirus, a new study suggests. Researchers analyzed blood samples from 46 healthy, mostly young or middle-aged adults after receipt of the two doses and again six months after the second dose. “Our study shows vaccination with the Pfizer-BioNtech vaccine induces high levels of neutralizing antibodies against the original vaccine strain, but these levels drop by nearly 10-fold by seven months” after the initial dose, Bali Pulendran of Stanford University and Mehul Suthar of Emory University said by email.