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COVID vaccines effective but household transmission of delta a risk for 1 in 4 | Imperial College |

Exploration of infectiousness cannot be based on a snapshot moment but data should be based on complete cycle before and after person becomes symptomatic. Such studies have been done to determine number of days a person needs to isolate. As I recall, with vaccination the number of days are less.

Transmissibility of SARS-CoV-2 among fully vaccinated individuals - Authors' reply | The Lancet - Jan. 1, 2022 |

We are aware of the relationship between age and infectiousness of index cases and susceptibility to infection in contacts. Indeed, our viral load kinetic data revealed a correlation between age and peak viral load, helping to explain the increased infectiousness of older adults relative to children. Given that our study was a snapshot of SARS-CoV-2 delta-variant transmission in real-life UK households, most unvaccinated participants were children and teenagers, whereas most vaccinated participants were adults, owing to the age prioritisation of national vaccine rollout. Accordingly, we could not directly compare the infectiousness of vaccinated breakthrough infections with age-matched unvaccinated cases nor the SAR in vaccinated contacts with age-matched unvaccinated contacts. Although we discussed the confounding effect of age on our results as a limitation of the study, we acknowledge that this could have been more clearly and explicitly elaborated in the Discussion.

Study to determine number of required days in isolation Covid-19 ...

Test to release from isolation after testing positive for SARS-CoV-2 | medRvix - Jan. 4, 2022 |

Most new studies are not yet peer reviewed.

'Sapere aude'

by Oui (Oui) on Tue Jan 18th, 2022 at 07:04:45 PM EST

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