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New placebo-controlled Covid-19 vaccine trials are ethically questionable; it's now about comparative effectiveness and availability of registered vaccines
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Author(s). Published by Elsevier Inc.
2021
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7962582/ https://www.ncbi.nlm.nih.gov/pubmed/33741502 http://dx.doi.org/10.1016/j.jclinepi.2021.03.006 |