The US Centers for Disease Control and Prevention has changed its Covid-19 testing guidelines and now no longer recommends testing for most people without symptoms, even if they've been in close contact with someone known to have the virus.
Previously, the CDC said viral testing was appropriate for people with recent or suspected exposure, even if they were asymptomatic.
Here's what the CDC website said previously: "Testing is recommended for all close contacts of persons with SARS-CoV-2 infection. Because of the potential for asymptomatic and pre-symptomatic transmission, it is important that contacts of individuals with SARS-CoV-2 infection be quickly identified and tested."
The CDC changed the site on Monday. Here's what it says now: "If you have been in close contact (within 6 feet) of a person with a COVID-19 infection for at least 15 minutes but do not have symptoms, you do not necessarily need a test unless you are a vulnerable individual or your health care provider or State or local public health officials recommend you take one."
Those who don't have Covid-19 symptoms and haven't been in close contact with someone with a known infection do not need a test, the updated guidelines say.
"Not everyone needs to be tested," the agency's website says. "If you do get tested, you should self-quarantine/isolate at home pending test results and follow the advice of your health care provider or a public health professional."
The CDC guidelines still say people should get tested if they have symptoms and that someone's health care provider "may advise a COVID-19 test."
"It is important to realize that you can be infected and spread the virus but feel well and have no symptoms," the updated CDC site says, noting that local public health officials might request asymptomatic "healthy people" be tested, depending on cases and spread in an area.