- the firm says a third shot increases neutralizing antibody levels
CNBC has more:Pfizer / BioNTech says they are developing a Covid-19 booster shot intended to target the delta variant developing an updated version of the vaccine.
“As seen in real world evidence released from the Israel Ministry of Health, vaccine efficacy has declined six months post-vaccination, at the same time that the Delta variant is becoming the dominate variant in the country