COVID-19

Coronavirus disease 2019 is a contagious disease caused by severe acute respiratory syndrome coronavirus 2. The first known case was identified in Wuhan, China, in December 2019. The disease has since spread worldwide, leading to an ongoing pandemic. Symptoms of COVID-19 are variable, but often include fever, cough, headache, fatigue, breathing difficulties, and loss of smell and taste. Symptoms may begin one to fourteen days after exposure to the virus. At least a third of people who are infected do not develop noticeable symptoms. Of those people who develop noticeable symptoms enough to be classed as patients, most develop mild to moderate symptoms, while 14% develop severe symptoms, and 5% suffer critical symptoms. Older people are at a higher risk of developing severe symptoms. Some people continue to experience a range of effects—known as long COVID—for months after recovery, and damage to organs has been observed.

Read more in the app

Persistent Smell Loss After COVID-19 Linked to Brain Structural Changes and Emotional Effects

New study shows global decline in parental trust in childhood vaccines after COVID-19, contributing to increased measles outbreaks - EurekAlert!

New 2025 data shows COVID-19 vaccines provide effective, durable protection - EurekAlert!

Durability of 2024-2025 COVID-19 vaccines against JN.1 subvariants - EurekAlert!

Study finds COVID-19 mRNA vaccine sparks immune response to fight cancer - EurekAlert!

COVID-19: Vitamin D levels fell during pandemic - EurekAlert!

A surprise bonus from COVID-19 vaccines: bolstering cancer treatment

Study finds COVID-19 mRNA vaccine sparks immune response to fight cancer - EurekAlert!

A vascular mechanism may explain the persistence of COVID-19 symptoms and their greater impact, especially in women - EurekAlert!

Enduring outcomes of COVID-19 work absences on the US labor market - EurekAlert!

California partnership aided COVID-19 response and health equity, report finds - EurekAlert!

Dietary patterns, food cravings and academic stress in Mexican university students during COVID-19 lockdown - EurekAlert!

Modeling the health impact of discontinuing COVID-19 vaccination during pregnancy in the US - EurekAlert!

Systematic Review Links COVID-19 Vaccines to Short-Term Menstrual Changes, Calls for Deeper Research

Ecuadorian scientists cleared of criminal charges in COVID-19 testing case

COVID-19 sore throat: XFG variant brings new symptoms

RFK Jr.’s Vaccine Panel Votes Down Its Own Proposal to Require Prescriptions for Covid-19 Shots

Scenario projections of COVID-19 burden in the US, 2024-2025 - EurekAlert!

Major new report sets out how to tackle the ‘profound and lasting impact’ of COVID-19 on cardiovascular health - EurekAlert!

COVID-19 is still a threat, but getting a vaccine is harder for many people