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Coronavirus: what does asymptomatic and mild COVID-19 mean?

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What Does an Asymptomatic COVID-19 Infection Look Like?

Some people who get sick with COVID-19 don't feel any symptoms of the disease, but what does an asymptomatic COVID-19 infection look like?

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Covid-19 News: Asymptomatic, Those With Mild Symptoms Can Tackle Covid At Home | FYI

Coronavirus News: Given the dire situation with beds in the country, Covid care at home is turning out to be critical. Not everyone needs hospitalisation, experts say. But how to decide on home care and how to do it, FYI has the answers for you.

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Clearing confusion on asymptomatic spread of COVID-19

Confusion abounds about the difference between asymptomatic and pre-symptomatic infections when it comes to the pandemic coronavirus. Dr. John Lynch, medical director of infection prevention and control at Harborview, explains asymptomatic means someone doesn't show symptoms the entire time they have this coronavirus in their body.

Pre-symptomatic describes the period of time before someone develops signs of illness. But, whether someone is asymptomatic or presymptomatic doesn't really matter to the general public. Either way, anyone carrying the coronavirus can spread the disease.

I think what we really want to send home is that you can have no symptoms, feel well and transmit this virus to other people, Lynch says.

That's why the practices of wearing a mask, washing your hands, and physical distancing are so important to prevent the spread of COVID-19.
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COVID-19 Q&A: Explaining mild, moderate and severe symptoms

Ohio State University Wexner Medical Center pulmonologist Avraham Cooper, MD, explains how to identify mild, moderate or severe COVID-19 symptoms and what to do if you're experiencing them.

This originally appeared live on our Facebook page on April 20, 2020, and may contain outdated information. For the latest recommendations on COVID-19, visit go.osu.edu/coronavirus.

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COVID-19 Insights: Are There Asymptomatic COVID-19 Patients?

Asymptomatic Cases of SARS-COV-2

Asymptomatic kids
Clinical and epidemiological features of 36 children with coronavirus disease 2019 (COVID-19) in Zhejiang, China: an observational cohort study


36 children. All were identified to be infected with severe acute respiratory syndrome coronavirus 2

Asymptomatic (ten [28%]) or
had acute upper respiratory symptoms (seven [19%]).


COVID-19 Antibody Seroprevalence in Santa Clara County, California


Their disclaimer
This article is a preprint and has not been certified by peer review [what does this mean?]. It reports new medical research that has yet to be evaluated and so should not be used to guide clinical practice.

Total population of the county is 1.9M

On the sample date 3rd and 4th of April, confirmed coronavirus cases in Santa Clara County was around 1,100. This is 0.05% of the population

Tested antibodies to SARS-COV-2 in the serum.
3,330 people
The population prevalence of COVID-19 in Santa Clara ranged from 2.49% (95CI 1.80-3.17%) to 4.16% (2.58-5.70%).
These prevalence estimates represent a range between 48,000 and 81,000 people infected in Santa Clara County by early April
50-85-fold more than the number of confirmed cases.


Coronavirus spread: Number of people infected by COVID-19 may be 50-80 times higher than official count, Stanford study suggests





GERMANY TO INTRODUCE CORONAVIRUS 'IMMUNITY CERTIFICATES' FOR RECOVERED PUBLIC


healthy/asymptomatic cases
NIH begins study to quantify undetected cases of coronavirus infection

SARS-COV-2 Antibody tests begin for understanding the seroconversion in


UC Berkeley to test 5,000 healthy people in East Bay for coronavirus

Over eight months, the researchers will conduct rounds of diagnostic tests using nasal swabs to identify infections. And they will take saliva and blood samples to look for antibodies, which would indicate that such people had had COVID-19 and recovered — perhaps without ever realizing they’d been infected with the coronavirus.


Presymptomatic Transmission of SARS-CoV-2 — Singapore, January 23–March 16, 2020



Asymptomatic and Presymptomatic SARS-CoV-2 Infections in Residents of a Long-Term Care Skilled Nursing Facility — King County, Washington, March 2020


You May Be Infected With Coronavirus and Not Know It


25% of the infected may be asymptomatic


CDC Director On Models For The Months To Come: 'This Virus Is Going To Be With Us'


I have been saying this for a long time.

1 in 4 people can be asymptomatic

One of the [pieces of] information that we have pretty much confirmed now is that a significant number of individuals that are infected actually remain asymptomatic. That may be as many as 25%. That's important, because now you have individuals that may not have any symptoms that can contribute to transmission, and we have learned that in fact they do contribute to transmission.
And finally, of those of us that get symptomatic, it appears that we're shedding significant virus in our oropharyngeal compartment, probably up to 48 hours before we show symptoms. This helps explain how rapidly this virus continues to spread across the country, because we have asymptomatic transmitters and we have individuals who are transmitting 48 hours before they become symptomatic.

Pediatrician says 80% of kids likely have coronavirus, but they're so asymptomatic you'd never know

Children are asymptomatic, mildly symptomatic, or note tested. But they are spreading the virus. ...

Disclaimer:
This video is not intended to provide assessment, diagnosis, treatment, or medical advice; it also does not constitute provision of healthcare services. The content provided in this video is for informational and educational purposes only.
Please consult with a physician or healthcare professional regarding any medical or mental health related diagnosis or treatment. No information in this video should ever be considered as a substitute for advice from a healthcare professional.

Why Are Some COVID-19 Cases Asymptomatic?

For many, COVID has been a devastating virus, but there are people who don't exhibit any symptoms at all. Why is that?

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How contagious are people with asymptomatic SARS-CoV-2?

How contagious are people with asymptomatic SARS-CoV-2, and how does the immune system respond to asymptomatic infection? The potential for SARS-CoV-2 to be spread by people who never exhibit symptoms of disease or those who exhibit delayed symptom onset is a serious concern and possible contributing factor to the pandemic spread of this virus. Not surprisingly, “stealth transmission,” as it is sometimes called, is especially difficult to identify and contain. But in order to effectively fight the spread of disease, we need to better understand how this virus behaves, especially as it pertains to asymptomatic cases.

References:

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Visit for more.

Answer Bank: Am I an asymptomatic COVID-19 patient?

As the COVID-19 pandemic continues to develop in nearly every country, the risk of asymptomatic patients has been brought into sharp focus. So, what are asymptomatic patients and how are they identified? CGTN explains.

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Myth: Asymptomatic people are not contagious and do not spread COVID-19

Learn more COVID-19 myths at

VERIFY: Viral post about how asymptomatic patients spread COVID-19 lacks context

The post portrays how easily someone can get COVID-19 and spread it without having symptoms. Someone asked the VERIFY team to fact check it.

More:
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69% Asymptomatic COVID-19 Cases: What Does It Mean for India & Should We Worry?

Why 69% of COVID-19 cases don't show any symptoms? Can asymptomatic cases transmit the virus? Is it worrying for India? Can this lead to widely discussed - herd immunity? We spoke to Dr Sumit Ray to answer all your questions related to asymptomatic and mildly infected cases.


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Tracking disease progression of COVID-19

Let's take a look at the common three stage progression of disease with COVID-19 — the viral response phase, the pulmonary phase, and the hyper inflammation phase.
Within those stages, we also review how the infection starts, what happens after the virus is transmitted and enters the patient's body, hospitalization needs, and briefly the recovery.

Speaker: Franz Wiesbauer, MD MPH
Internist & Founder at Medmastery
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Please Note: Medmastery's videos, medical lectures, medical illustrations, and medical animations are for medical education and exam preparation purposes, and not intended to replace recommendations by your doctor or health care provider.

#medmastery #coronavirus #COVID19 #sarscov2 #coronaviruschina #coronavirustruth #WHO #wuhan #infection #pandemic #publichealth

The threat of coronavirus transmission by asymptomatic carriers | COVID 19

Asymtomatic coronavirus spreaders dont show visible symptoms, like coughing or fever. But they could well be passing on the coronavirus. Experts argue many patients appear most contagious right before the onset of symptoms. Models suggest half all transmissions can be traced back to people, before they get sick - if they get sick at all. Many doctors say therefore only mass testing can break the chain of transmission. But the US Centers for Disease Control and Prevention has changed its testing guidelines to exclude people who don't have symptoms, even if they've been recently exposed to the virus.
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#Coronavirus #Contagion #Asymtomatic

Facts Not Fear: Why are some people with COVID-19 asymptomatic?

9Health Expert Dr. Payal Kohli is talking about the scientific factors that offer insight into how sick people get.

COVID-19 Update 18: When are patients really infectious?

Individuals are infectious with COVID-19 when they're shedding the virus, which means that the virus replicates in the cells of their upper or lower respiratory tract. In this video, we will examine published articles discussing viral shedding, the incubation period (mean incubation period was 5.2 days) and the serial interval, by examining the results of 77 COVID-19 transmission pairs.

The study found that infectiousness starts 2.3 days before symptom onset. That patients are most infectious 0.7 days before symptom onset.They also found that 44% of infectiousness or infections occurred in the pre-symptomatic phase making it difficult to track.

#medmastery #coronavirus #COVID19 #sarscov2 #coronaviruschina #coronavirustruth #coronavirusdeaths #WHO #wuhan #infection #pandemic #publichealth
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Links for reference:


-----------------------------------------------------------
More updates by Dr. Wiesbauer:
COVID-19 Update 1: How to tell if a pandemic is likely to occur or not–R0 and the serial interval:
COVID-19 Update 2: How to stop an epidemic - Herd immunity:
COVID-19 Update 3: Symptoms of COVID-19:
COVID-19 Update 4: Clinical characteristics of COVID-19:
COVID-19 Update 5: Estimating case fatality rates for COVID-19:
COVID-19 Update 6: Seasonality: will COVID-19 go away in the summer?:
COVID-19 Update 7: This is probably the most important picture of the whole Coronavirus-epidemic:
COVID-19 Update 8: Zinc and chloroquine for the treatment of COVID-19?:
COVID-19 Update 9: Hydroxychloroquine and azithromycin for the treatment of COVID-19–Review of study by Didier Raoult:
COVID-19 Update 10: Is COVID-19 an airborne disease? Will we all need to wear face-masks against SARS-CoV-2?
COVID-19 Update 11: How exactly the coronavirus becomes airborne.
COVID-19 Update 12: Attack rates of COVID-19 depend on face-to-face time spent with infected persons:

COVID-19 Update 13: Randomized Controlled Trial of Hydroxychloroquine in Patients with COVID-19:

COVID-19 Update 14: Are children contributing to the spread of COVID-19?

COVID-19 Update 15: Can we disinfect and reuse N95 masks?:


COVID-19 Update 16: Effectiveness of surgical masks for prevention


COVID-19 Update 17: How an app can get us out of lockdown

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Speaker: Franz Wiesbauer, MD MPH
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Please Note: Medmastery's videos, medical lectures, medical illustrations, and medical animations are for medical education and exam preparation purposes, and not intended to replace recommendations by your doctor or health care provider.
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Why Can't All States Treat Asymptomatic Covid-19 Patients At Home? | ABP News

Delhi and Mumbai witnessed an explosion of Coronavirus (Covid-19) cases. However, most patients, who were asymptomatic were isolated and quarantined at their homes and did not have to go to the hospitals for treatment. Why are certain cities and states not allowing home isolation and treatment of asymptomatic coronavirus patients? If this can happen in Delhi and Mumbai, why not other states? Listen to a few Covid-19 patients who were successfully treated at home.

#AsymptomaticCovid19 #Covid19 #ABPNewsLive

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WHO Says Covid-19 Asymptomatic Transmission Is ‘Very Rare’

Jun.08 -- Maria Van Kerkhove, head of the World Health Organization’s emerging diseases and zoonosis unit, says transmission of the coronavirus by people who aren’t showing symptoms is very rare.” She spoke Monday at a briefing in Geneva. (Excerpt)

What Are Asymptomatic COVID-19 Cases? | NewsMo | Shiv Aroor

The Indian Council of Medical Research (ICMR) has said that 80% of COVID-19 cases are Asymptomatic. But what does ‘Asymptomatic’ really mean?
A case is considered asymptomatic if a patient is a carrier for a disease or an infection in their body but never develops any symptoms.
Mostly younger patients with a good immunity system like children & adults may not show symptoms and are asymptomatic. Watch the video to know more.
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Genetic link between asymptomatic patients and COVID-19

A study by the UK’s Newcastle University has reported that a gene called HLA-DRB1*04:01 gives protection against COVID-19.This gene is found 3 times more often in asymptomatic patients. It could explain why some people catch the virus but do not get sick. Asymptomatic subjects were compared to people from the same community who had developed COVID-19 and did not have any co-morbidity or underlying illness.The gene is directly related to latitude and longitude. More people from North and Western Europe are likely to have this gene.This means that people of European origin are more likely to be asymptomatic. But they can spread the disease to vulnerable populations. Genetic tests can be developed, which will help governments prioritize people for future vaccinations.

Explained | Can asymptomatic patients transmit coronavirus?

WHO clarifies remarks after it said coronavirus transmission by asymptomatic people is 'very rare'.

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