The company claims its shot is ‘90% effective’ and will be available to the public soon, but serious questions about the vaccine’s safety remain Mere days after Pfizer announced its new “90% effective” coronavirus vaccine, reports have emerged about “severe” side effects volunteers for the vaccine trial experienced, including fevers and headaches. According to the…
Tag: Efficacy
BMJ Open reports “first RCT of cloth masks, and the results caution against the use of cloth masks”
This study is the first RCT of cloth masks, and the results caution against the use of cloth masks… Moisture retention, reuse of cloth masks and poor filtration may result in increased risk of infection. Further research is needed to inform the widespread use of cloth masks globally. However, as a precautionary measure, cloth masks…
StatNews reports: “The world needs Covid-19 vaccines. It may also be overestimating their power”
Ideally, vaccines would prevent infection entirely, inducing what’s known as “sterilizing immunity.” But early work on some of the vaccine candidates suggests they may not stop infection in the upper respiratory tract — and they may not stop an infected person from spreading virus by coughing or speaking. A recently released study in which macaques were vaccinated…