Data also reveal a single dose of the vaccine or that from AstraZeneca is even less effective. New research published in The New England Journal of Medicine shows the company’s vaccine is 88% effective against the highly transmissible delta variant compared with 95% to 100% efficacy seen in late-stage trials. Pfizer Vaccine Not as Effective Against Delta Variant The statement also cites data showing rates of flu vaccinations increase when mandates for workers are in place. At this point, no data have suggested a significant waning of vaccine efficacy or an increase in infections among those fully vaccinated.Ĭalls for Health Workers to Be VaccinatedĪ statement from the Society for Healthcare Epidemiology of America calls on medical facilities to require workers to receive the COVID-19 vaccine, noting a sufficient rate of vaccination will not be achieved without a mandate. Approximately 100 have been identified at this point.įollowing a meeting with Pfizer, HHS officials say fully vaccinated individuals do not need a COVID-19 vaccine booster shot. This rare condition occurs when the immune system damages nerve cells, causing muscle weakness and potential paralysis. The FDA warns that the COVID-19 vaccine manufactured by Johnson & Johnson (J&J) can lead to an increased risk of Guillain-Barré syndrome. According to Fauci, the lack of full approval is only a “technical issue” and data point to the high efficacy and safety of the vaccines worldwide. With the delta variant making its way around the globe, the companies also said they will begin clinical trials of an updated 2-dose vaccine in August.Īnthony Fauci, MD, President Joe Biden's medical advisor, addresses concerns about COVID-19 vaccines being perceived as experimental and not fully tested due to their emergency use authorization status. Pfizer and BioNTech announce they will seek approval from the FDA for a booster of their mRNA COVID-19 vaccine, despite the agency saying a booster is not necessary at this time. Protection remained high against severe disease. The vaccine’s efficacy against illness was reported to drop from 94% to 64% based on data from June 6 through early July. Government data reported from Israel show that the Pfizer/BioNTech vaccine is slightly less effective in preventing SARS-CoV-2, the virus that causes COVID-19, in recent weeks. Israel Data Show Dip in Pfizer Vaccine Efficacy This is a timeline of COVID-19 vaccine developments from July 1, 2021. To understand COVID-19 vaccine developments thus far, read the COVID-19 vaccine timeline from January 1 to June 30, 2021, or see the first COVID-19 timeline from 2020. Nearly 2 years into the pandemic, questions persist and new barriers arise. December 2021 marks 1 year since the COVID-19 vaccine rollout began, and the current US death toll stands at over 800,000, compared with just 300,000 in December of 2020.Īlthough 2021 closes with a plentiful supply of COVID-19 vaccines and boosters, Americans continue to face challenges with the widespread Omicron variant and new testing hurdles.
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