People can get long Covid without testing positive for virus: Study

“We estimated that there were approximately 10 million people in the first year of the pandemic in the US who are in this predicament: who got Covid, got long Covid, but tested negative for Covid."

Characterizing long COVID in an international cohort: 7 months of symptoms and their impact - eClinicalMedicine

Coronavirus Antibodies Prevent Reinfection - NCI

When Are You Most Contagious With COVID? - GoodRx

Researchers Identify Four Long COVID Categories

Attributes and predictors of long COVID

Long COVID symptoms can improve, but their resolution is slow and imperfect

Penn Study Finds Serotonin Reduction Causes Long COVID Symptoms

Long Covid and the Importance of Boosters

How long can the virus that causes COVID-19 live on surfaces?

Duration of Shedding of Culturable Virus in SARS-CoV-2 Omicron (BA.1) Infection

Is Five Days of COVID Isolation Enough? New BU Study Has Some Answers, The Brink

Frequently Asked Questions about Testing and Treatment