Walter Isaacson, a participant in Pfizer’s Covid vaccine trial, describes what it’s like

Sumary of Walter Isaacson, a participant in Pfizer’s Covid vaccine trial, describes what it’s like:

• He spoke after Monday, Pfizer said the vaccine it’s developing with German firm BioNTech is more than 90% effective in preventing Covid-19 for those who had no evidence of previously being infected..
• The results came from an interim analysis of trial data, showing 94 confirmed Covid-19 infections among its 43,538 participants..
• Ensuring participants are not aware is a critical part of double-blind clinical trials, which are the gold standard in science….

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From CNBC News - November 10, 2020May 9, 2021