Health
Johnson & Johnson one-dose COVID-19 shot offers strong protection, fuels concern about variants – Firstpost
The vaccine’s efficacy rate dropped from 72 percent in the United States to just 57 percent in South Africa, where a highly contagious variant is driving most cases….
Unlike the messenger RNA vaccines made by Pfizer-BioNTech and Moderna, Johnson & Johnson uses an adenovirus, which normally causes the common cold. While adenovirus-based vaccines have been investigated for some three decades, they have yet to be licensed for use in the United States.
Johnson & Johnsons Ebola vaccine became the first approved adenovirus-based vaccine for any disease when European regulators gave it the green light last July. Astra-Zeneca and the University of Oxford used a different…
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