Reinfections lower long COVID risk but raise cumulative burden

	COVID-19
	The latest COVID-19 news from News Medical

	Reinfections lower long COVID risk but raise cumulative burden A population-based study in Quebec found that healthcare workers faced a threefold higher risk of long COVID after a first infection compared to reinfections. However, the cumulative risk rose with each additional infection, especially among those with severe illness or early variants.

	Lower fitness before infection raises risk of long COVID, study finds Adults who later developed long COVID had lower cardiorespiratory fitness (CRF) before infection than those who did not. COVID-19 was not linked to accelerated or clinically significant declines in CRF, even among long COVID cases.

			New WHO report reveals the deeper health impacts caused by COVID-19 pandemic WHO published its World health statistics report 2025, revealing the deeper health impacts caused by the COVID-19 pandemic on loss of lives, longevity and overall health and well-being.

			Study links long COVID brain fog to inflammation and stress markers A new study that is the first to compare inflammation and brain stress responses in long COVID-19 patients with individuals who have fully recovered shows that those with continued brain fog and other cognitive issues have a lower ability to adapt to stress and higher levels of inflammation in their brains.

			Common anti-inflammatory drugs may aid virus spread New research shows an unintended and unfortunate side effect of common drugs. They can simply help viruses spread.

	Breakthrough bat organoid platform sheds light on behavior of zoonotic viruses Did you know that more than 75% of new infectious diseases affecting humans originally come from animals? Bats, in particular, are natural hosts to some of the world's most dangerous viruses, including those responsible for COVID-19 (SARS-CoV-2), MERS-CoV, influenza A, and hantavirus outbreaks.

	Socioeconomic gaps persist in COVID-19 vaccination among older Swedes The spring COVID-19 vaccination program in Sweden is in its final stages in several parts of the country. The program has encompassed free booster doses for those at increased risk of serious illness, including the very oldest members of society.

	Electromagnetic waves disrupt SARS-CoV-2 spike protein and lower infectivity Researchers demonstrated that specific electromagnetic wave frequencies can disrupt the SARS-CoV-2 Spike protein structure in virus-like particles, leading to reduced infectivity in cell models. This proof-of-concept study suggests new avenues for non-chemical viral inactivation methods.

	WHO member states adopt landmark Pandemic Agreement Member States of the World Health Organization (WHO) today formally adopted by consensus the world's first Pandemic Agreement.

	Nasal vaccine boosters can trigger strong immune defenses in the respiratory tract, study finds Most vaccines — and boosters — are injected directly into muscle tissue, usually in the upper arm, to kickstart the body's immune system in the fight against disease.

	Study sheds light on public attitudes about transplant allocations Becoming an organ donor has never been easier. Registration is available online when renewing a driver's license or, for iPhone users, through an app.

	How the Trump administration aims to slash health care spending Health care has proved a vulnerable target for the firehose of cuts and policy changes President Donald Trump ordered in the name of reducing waste and improving efficiency.

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