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XEC is an Omicron variant, Russo explains. But it has several mutations in the spike protein, which is what the virus uses to infect you. That can make XEC more contagious than previous variants ...
Here's how long it typically takes for symptoms to start.
Here’s what Yahoo News medical contributor Dr. Lucy McBride advises if you’ve exposed to someone who tested positive for COVID-19, particularly for parents or guardians with school-age children.
In May 2022, a preprint indicated Omicron subvariants BA.4 and BA.5 could cause a large share of COVID-19 reinfections, beyond the increase of reinfections caused by the Omicron lineage, even for people who were infected by Omicron BA.1 due to increases in immune evasion, especially for the unvaccinated. However, the observed escape of BA.4 and ...
The median delay for COVID-19 is four to five days [17] possibly being infectious on 1–4 of those days. [18] Most symptomatic people experience symptoms within two to seven days after exposure, and almost all will experience at least one symptom within 12 days. [17] [19] Most people recover from the acute phase of the disease.
The 2023 paper also cites a research letter published in 2022, that suggests that the surge of COVID-19 cases in hospitals may have been due to the high contagiousness of Omicron, [42] an article which suggested a high secondary attack rate relative to Delta, [43] and papers finding increased mortality of cancer patients due to higher rates of ...
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After nearly two months of lab studies and real-world observations, experts have a much clearer picture of what Omicron is — and isn’t — capable of.
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