Diseases, Conditions, Syndromes

Prior SARS-CoV-2 infection less protective against Omicron variant

(HealthDay)—Previous severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection is about 90 percent effective for preventing reinfection with the alpha, beta, and delta variants but offers lower protection against ...

Diseases, Conditions, Syndromes

Study of U.S. employees defines the odds of COVID-19 reinfection

In 2020 and early 2021, people who had been infected with SARS-CoV-2 had around 72% to 86% protection against reinfection with the virus for at least six months, according to a new study published February 10 in PLOS Biology ...

Diseases, Conditions, Syndromes

Two-thirds of Omicron cases in England reinfections: study

Nearly two-thirds of people in England who tested positive for COVID-19 in January previously had the virus or suspected they had it, a large long-running infection survey revealed Wednesday.

Diseases, Conditions, Syndromes

Researchers identify immunological markers for SARS-CoV-2 reinfection

Many experts now predict that COVID-19, which so far has killed more than 5.5 million people worldwide, will remain endemic as new, infectious variants of SARS-CoV-2 emerge. These new variants could pose a greater risk of ...

Diseases, Conditions, Syndromes

For earlier variants, severe COVID-19 less likely at reinfection

(HealthDay)—Compared with primary infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), reinfections have 90 percent lower odds of severe, critical, or fatal disease based on data for the variants ...

Diseases, Conditions, Syndromes

Study suggests past COVID infection may not fend off omicron

South African scientists are warning that reinfections among people who've already battled COVID-19 appear to be more likely with the new omicron variant than with earlier coronavirus mutants.

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