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COVID-19, a disease caused by the SARS-CoV-2 virus, first appeared in humans in late 2019 and caused a pandemic starting in spring 2020. Related coronaviruses MERS-CoV (which causes MERS) and SARS-CoV-1 (SARS) have caused regional outbreaks but not pandemics at this point.

Study: Antibiotics don't reduce risk of death from viral respiratory infections

Chris Dall

Nearly two-thirds of patients hospitalized with flu, RSV, or COVID-19 received antibiotics, but they had a higher risk of death than those who didn't.

Intravenous therapy drip
Masks and N95 respirators

Study on masks vs N95 respirators for health workers spurs concerns

Mary Van Beusekom | News Writer | CIDRAP News

Study suggests medical masks may offer similar protecion as N95 respirators, but experts say hold on.

COMMENTARY: Navigating COVID language traps

Peter M. Sandman, PhD

Public health professionals use some terms imprecisely, others incorrectly, and still others technically accurate but almost sure to be misunderstood by the public.

News briefs

WHO vaccine advisers update COVID vaccine recommendations

Lisa Schnirring

Lucira announces US launch of combo COVID-flu home test

Lisa Schnirring

Survey finds no link between COVID vaccination and period disruption

Lisa Schnirring

Nirmatrelvir tied to 26% lower risk of long COVID, 47% lower risk of death

Mary Van Beusekom

WHO: COVID activity up in 3 world regions

Lisa Schnirring

Americans less active after emergence of COVID-19, study finds

Mary Van Beusekom

5,000 US COVID deaths may have been averted in winter 2022 under higher Paxlovid use

Mary Van Beusekom
COVID-19 isolate, first case - Yellow

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Listen to the Osterholm Update: COVID-19

Catch the latest episode!

Michael Osterholm

The answers to your COVID questions

Top COVID FAQs

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Read COVID-19 commentaries

By CIDRAP & other experts

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Our roundup of the best COVID visualizations

Up-to-date COVID-19 data

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With new nCoV case in Chicago, US says no travel to Wuhan

A woman in Chicago becomes the 2nd imported US case of the novel coronavirus.

Stephanie Soucheray | News Reporter | CIDRAP News
Travelers at O'Hare Airport

Studies highlight nCoV similarity with SARS, family transmission

A study of Wuhan's earliest cases details serious SARS-like symptoms and a 15% death rate.

Jim Wappes | Editorial Director | CIDRAP News
CPR in hospital

WHO holds off on nCoV emergency declaration as cases soar

Also, CEPI announces a major push to develop vaccines as cases top 600.

Lisa Schnirring | News Editor | CIDRAP News
Hong Kong woman wearing surgical mask

WHO decision on nCoV emergency delayed as cases spike

The emergency committee holds off on declaring a public health emergency of international concern.

Lisa Schnirring | News Editor | CIDRAP News
WHO flag

US detects first novel coronavirus case, in traveler

The man didn't visit markets or have contact with sick patients while in Wuhan.

Lisa Schnirring | News Editor | CIDRAP News
Seattle from the air

WHO eyes possible sustained nCoV spread in China

A Chinese medical community tracking numbers puts China's outbreak total at 321 cases.

Lisa Schnirring | News Editor | CIDRAP News
Nurse with IV drip

New coronavirus infects health workers, spreads to Korea

Fourteen health workers are now infected in the 218-case nCoV outbreak.

Lisa Schnirring | News Editor | CIDRAP News
Blurry health workers in hallway

Wuhan nCoV outbreak quadruples, spreads within China

A surge in the last past 2 days lifts the outbreak total to 198, with 1 new case in Shenzhen.

Lisa Schnirring | News Editor | CIDRAP News
Shenzhen, China, skyline

As Thailand notes 2nd nCoV case, CDC begins airport screening

Screening will begin at airports in New York, San Francisco, and Los Angeles.

Lisa Schnirring | News Editor | CIDRAP News
Asian boy in airport

Japan has 1st novel coronavirus case; China reports another death

The death in China is the second in the outbreak.

Lisa Schnirring | News Editor | CIDRAP News