Interesting info coming out of the CDC in the USA about the Delta variant.
https://www.washingtonpost.com/healt...mask-guidance/
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The delta variant of the coronavirus appears to cause more severe illness than earlier variants and spreads as easily as chickenpox, according to an internal federal health document that argues officials must “acknowledge the war has changed.”
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It cites a combination of recently obtained, still-unpublished data from outbreak investigations and outside studies showing that vaccinated individuals infected with delta may be able to transmit the virus as easily as those who are unvaccinated. Vaccinated people infected with delta have measurable viral loads similar to those who are unvaccinated and infected with the variant.
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The CDC’s revised mask guidance stops short of what the internal document calls for. “Given higher transmissibility and current vaccine coverage, universal masking is essential to reduce transmission of the Delta variant,” it states.
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Source presentation
https://context-cdn.washingtonpost.c...f75165.#page=1
The Delta variant flourishes in your nose and throat, and if you’re vaccinated, the immune system kicks in and clears the infection when the virus tries to attack the lungs - however, this takes a couple of days, and during that time, you’re shedding viral load to those around you.
tl:dr - Vaccines are still working incredibly well, but is possible for the vaccinated to become infected (perhaps asymptomatically) and spread the Delta variant to others - wearing masks helps prevent this.