"Since Delta came onto the scene, I’ve acquired a pile of anecdotes from social media and a few examples from countries, like Singapore, that are doing a better job of tracing such cases that indicate vaccinated people are sometimes transmitting the virus. In comparison, I had hardly heard of any such examples from the Alpha variant, and studies did not indicate it could evade immunity in a substantive way. We also know that Delta has a higher viral load and infected people start shedding viral particles much earlier, so it makes sense why all this is happening.
Shouldn’t we have better evidence, though, so we can have better guidance, especially for those who live with unvaccinated children or have immunocompromised family members?
Given the ongoing nature of the threat and many remaining unknowns, the Occupational Safety and Health Administration should provide rules for rapid testing in workplaces, paid sick leave and, as appropriate, high-filtration masks and even ventilation standards."
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