Sunday, May 9, 2021
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Coronavirus Illness 2019 (COVID-19)

COVID-19 can have an effect on anybody, and the illness may cause signs starting from delicate to very extreme.  For another diseases brought on by respiratory viruses (comparable to influenza), some folks could also be extra prone to have extreme sickness than others as a result of they’ve traits or medical circumstances that enhance their threat. These are generally known as “threat components.”  Examples embody older age or having sure underlying medical circumstances.

CDC is conducting illness surveillance and area investigations to raised perceive why some individuals are extra prone to develop extreme COVID-19 sickness. This is among the prime priorities in CDC’s technique to fight COVID-19. What we be taught from these efforts will present very important data to assist CDC scientists and different public well being officers make selections to guard our most susceptible populations.

CDC carries out these actions in collaboration with state, native, and territorial well being departments; public well being, industrial, and medical laboratories; very important statistics workplaces; well being care suppliers; emergency departments; and educational and personal sector companions.

Why Threat Elements Matter

Folks with threat components could also be extra prone to want hospitalization or intensive care if they’ve COVID-19, or they might be extra prone to die of the an infection.

You will need to study threat components for extreme COVID-19 sickness as a result of it might allow you to:

  • Take precautions as you go about your day by day life and attend occasions.
  • Higher perceive how a medical situation may have an effect on your individual well being when you get sick with COVID-19.
  • Anticipate medical remedy that you simply may want when you get sick.
  • Cut back your threat for extreme COVID-19 sickness by managing any circumstances you’ve gotten which might be threat components.

How We Find out about Threat Elements for Extreme Illness

As a result of COVID-19 is a brand new illness, extra work is required to raised perceive the danger components for extreme sickness or problems. Potential threat components which were recognized to this point embody:

  • Age
  • Race/ethnicity
  • Gender
  • Some medical circumstances
  • Use of sure medicines
  • Poverty and crowding
  • Sure occupations
  • Being pregnant

Further analysis will assist us affirm if these are threat components for extreme COVID-19 sickness and decide if there are different components that enhance an individual’s threat.


CDC is working to establish threat components for extreme COVID-19 sickness by way of quite a lot of investigations, a few of that are described beneath.  These investigations embody adults and kids and study extreme sickness leading to hospitalizations and intensive care unit (ICU) admissions. As we proceed to research threat components for extreme sickness, we are going to replace this webpage with new findings and new investigations.

Examine traits of individuals with COVID-19 who’ve signs with traits of individuals with COVID-19 who should not have signs.

How folks with COVID-19 who’ve signs are totally different from these with COVID-19 who should not have signs.

How folks with COVID-19 who really feel extra sick (for instance, sick sufficient to wish to remain in mattress or to hunt medical care) are totally different from these with COVID-19 who really feel much less sick.

*Investigations used embody: Ongoing family investigations

Examine traits of individuals with COVID-19 who’re hospitalized in ICUs with traits of:

  • Folks hospitalized with COVID-19 who don’t require ICU care, and
  • Folks with COVID-19 who usually are not hospitalized, and
  • The overall U.S. inhabitants.

How folks with COVID-19 who’re sick sufficient to wish ICU care are totally different from much less sick folks with COVID-19 who’re hospitalized, folks with COVID-19 who usually are not hospitalized, and the U.S. common inhabitants.

*Networks used embody: Influenza Vaccine effectiveness in critically unwell sufferers (IVY)

COVID-19 Hospitalization and Dying by Age

COVID-19 Hospitalization and Death by Race/Ethnicitypdf icon

COVID-19 Hospitalization and Dying by Race/Ethnicity

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