Opinion sample before taking survey
Your answers can help end the pandemic quicker and with fewer casualties.
Current projections of vaccine effectiveness are 40-60%.  This is similar to research-demonstrated mask effectiveness of 50-75%.  Did you know this? *
If vaccine effectiveness is 60% and half of a population have been vaccinated, what is the approximate reduction in COVID transmission rate? *
How long do you think it will take to vaccinate most of the World's population? *
Population (herd) immunity is all or nothing - a threshold effect? *
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