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I think the only reasonable explanation is double vaxxed low symptom person are infectious and spreading all over the place.

R rates for cases in vaxxed and uvaxxed rates are similar. Age groups all have similar R regardless of vaccination %. That most testing is on symptomatic people (unvaxxed are far more likely to have symptoms) explains the raw number disparity observed outside of the UK.

R looks similar or even less than prior waves. Looking at India (where vaccinations didn't complicate the data) there is no chance Delta has an R0 much different than 2.5-3.0. The width and peak is that of a normal R0~2.7.

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Difficult to gage RO in India because of the possibility of many infected symptomatic and fatal cases not being recorded. ( excess deaths appear to show that this was substantial. Relative to population their testing was a bit low, yet at one point was reported to be north of 15. The good news is that after government sponsored Ivermectin roll out, the positive rate dropped more then 99 percent to .01!

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Testing north of 15 percent positive.

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