https://www.selleckchem.com/
For this and other reasons having to do with equal rights, participants in control groups should be protected with the most effective vaccines available.The initial trials of SARS-CoV-2 vaccines were randomised control trials (RCT) with a placebo as control. The use of a placebo was ethically justified because, as with any new and emerging infectious disease, there was no known vaccine. There are now at least eight vaccines that have been shown to be effective and approved for emergency use, so the use of a placebo in the control group is no longer ethicall
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