American has the youngest fleet among US major airlines, making its capital expenditure obligations smaller than some competitors in the medium term. American is the most leveraged US-based major ...

Five years after the World Health Organization declared a global pandemic, there has been progress — and backsliding in the ...

University of Virginia School of Medicine scientists have discovered how severe COVID-19 can destroy immune cells' ability to ...

SARS-CoV-2 between 2021 and 2023 developed long-COVID, and in more than half of them the symptoms persisted for two years.

Five years after the COVID-19 pandemic began, the virus continues to spread around the globe as the virus continues to evolve. Scientists say that's likely to continue indefinitely, as the virus finds ...

SARS-CoV-2 has been evolving the ability to evade the immune system about twice as fast as the fastest-evolving flu virus. It ...

The virus that causes COVID-19 continues to mutate. Scientists say that's likely to continue indefinitely, and the virus will ...

The COVID-19 virus spreads mainly through exposure to airborne droplets infected with the virus. While it's possible to be infected with COVID by coming in contact with a surface with the virus on ...

Efficacy and safety of SARS-CoV-2 vaccination in pregnancy to prevent COVID-19 in mothers and early infancy (Protocol). Cochrane Database of Systematic Reviews 2025, Issue 2. Art. No.: CD015785. DOI: ...

Scientists warn that this virus has the ability to bind to the human ACE2 receptor, the same pathway utilized by SARS-CoV-2, suggesting a potential risk for animal-to-human transmission.

Scientists found that the new virus can bind to human ACE2, making it similar to SARS-CoV-2 and NL63 (a common cold virus). The new virus called HKU5-CoV-2, discovered in bats in China ...

This is a protocol for a Cochrane Review (intervention). The objectives are as follows: To assess the effectiveness of different SARS-CoV-2 testing strategies in reducing COVID-19 cases, ...