結果 : is covid more contagious before or after symptoms
1:37

How long is someone with COVID contagious?

CBS Boston
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When Is COVID-19 Most Contagious?

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COVID-19: When are you no longer contagious after testing positive or experiencing symptoms?

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COVID-19 is most transmissible 2 days before, 3 days after symptoms appear, study finds

WFRV Local 5
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COVID Is Most Infectious before You Begin to Feel Sick

The Doctors
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Are you most infectious before or after you get COVID-19 symptoms?

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COVID delta explained | Is it more contagious? What are the symptoms and more

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How Many Days Is Someone Contagious Before Coronavirus Symptoms Start To Appear? | MSNBC

MSNBC
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COVID-19 vs. Flu vs. RSV: How to tell the difference between respiratory infections

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Dr. Jason Bowling on how long COVID-19 is contagious

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Has There Been a Shift in COVID Contagious Timeframe? | Ask Dr. David

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COVID-19 patients most infectious before showing symptoms

azcentral.com and The Arizona Republic
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Flu, Cold, COVID-19: Am I still contagious?

News4JAX The Local Station
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How long are you contagious if you have COVID-19?

WFMY News 2
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VERIFY: Can a person still be contagious more than 5 days after their 1st positive COVID-19 test?

12NewsNow
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When Are You Most Contagious with COVID? A Doctor Explains

Dr. Jen Caudle
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Coronavirus Is Even More Contagious Than We Thought | Mashable News

Mashable
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VERIFY: Can you test positive for COVID-19 long after you're contagious?

WCNC
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Are Kids With COVID More Contagious Than Adults?

F. Perry Wilson, MD
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Researchers learn more about length of COVID-19 symptoms, treatments

CBC News: The National
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