COVID-19 may be most infectious in the two days before and three days after symptom onset while patients are mildly or moderately ill, according to research published Aug. 23 in JAMA Internal Medicine ...

Updated 2024-2025 COVID-19 vaccines significantly reduced the risk for hospitalization and severe outcomes despite the emergence of new viral lineages.

The authors developed and validated an accurate, well-calibrated, easy-to-implement COVID-19 hospitalized patient deterioration index to identify patients at high or low risk of clinical deterioration ...

In a recent study published in BMJ Global Health, researchers compare coronavirus disease 2019 (COVID-19) excess mortality rates across 183 countries. Study: Evaluation of the Global Health Security ...