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Coronavirus Illness 2019 (COVID-19)


Serology assessments, also called antibody assessments, search for antibodies within the blood.

Antibodies are proteins that may combat off infections.

Seroprevalence Surveys are investigations that use serology testing.

CDC is working with state, native, territorial, educational, and business companions to raised perceive COVID-19 in the US. CDC has an overarching technique for studying extra about how many individuals have been contaminated with SARS-CoV-2, the virus that causes COVID-19, and the way it’s spreading by means of the U.S. inhabitants. This technique consists of utilizing serology testing for surveillance to raised perceive what number of infections with SARS-CoV-2 have occurred:

  • At completely different cut-off dates,
  • In numerous areas, and
  • Inside completely different populations in the US.

CDC is collaborating with public well being and personal companions on a wide range of surveys of various sizes, areas, populations studied, and functions. The seroprevalence surveys CDC is conducting embody:

Serology assessments search for antibodies in blood. If antibodies are discovered, which means there was a earlier an infection. Antibodies are proteins that may combat off infections. Investigations utilizing serology testing are known as seroprevalence surveys. CDC is collaborating with public well being and personal companions on a wide range of seroprevalence surveys of various sizes, areas, populations studied, and functions. The seroprevalence surveys CDC is conducting embody large-scale geographic surveys, group stage surveys, and smaller-scale surveys specializing in particular populations as a way to study extra about COVID-19.

Aims of Surveillance of U.S. Serology Testing

  • To offer a extra full estimate of how frequent COVID-19 is (or the incidence of an infection)
  • To information management measures, akin to social distancing

Serology testing surveillance supplies essential data

A key CDC precedence is to trace COVID-19 infections to find out how a lot of the U.S. inhabitants is contaminated over time. CDC makes use of a wide range of surveillance programs to trace COVID-19 circumstances based mostly on individuals who search medical care. Nonetheless, these programs can miss infections that happen in individuals who had delicate or asymptomatic sickness (i.e., no indicators or signs) who didn’t search medical care or get examined.

By utilizing seroprevalence surveys, CDC can study in regards to the complete variety of individuals which have been contaminated, together with these infections which may have been missed. These surveys additionally might help estimate how a lot of the inhabitants has not but been contaminated, serving to public well being officers plan for future healthcare wants. These surveys may also monitor how infections progress by means of the inhabitants over time. That is finished by taking “snap pictures” of the proportion of people that have antibodies towards SARS-CoV-2 (additionally known as the seroprevalence) at completely different time factors.

Seroprevalence surveys can also take a look at threat components for illness, akin to an individual’s age, location, or underlying well being situations. Lastly, some sorts of seroprevalence surveys can decide how lengthy antibodies final in individuals’s our bodies following an infection.



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