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Rapid antigenic tests for covid-19 will be used in Mexico


In Mexico, the new -fast- antigenic tests can be used, which in practically a matter of minutes detect if a person -with symptoms- is infected with Covid-19.

This Friday, the Institute of Epidemiological Diagnosis and Reference (INDRE) will publish the technical report of the evaluation of said tests, so that later, they can be endorsed by the Federal Commission for Protection against Sanitary Risks (COFEPRIS) and can be used in the country .

This test, which is performed through a nasopharyngeal exudate to detect SARS-CoV-2 viral proteins, will be included as another option that can be used, in addition to the PCR test, which due to its high specificity and sensitivity, is considered the gold standard to detect coronavirus infections, even in asymptomatic people.

José Luis Alomía Zegarra, general director of Epidemiology, explained that the antigenic test has a high specificity and a variable sensitivity, therefore, it can be taken from the first day of the appearance of symptoms and until day seven of having started them.

However, if the person has no symptoms, the test is not recommended.

If that test is taken on a person who has no symptoms the chance of having a false negative is high. It means that the test can be negative, even if the virus is present in the person ”, he indicated.

For his part, Hugo López-Gatell Ramírez, Undersecretary of Prevention and Health Promotion, called on the population not to confuse this new-rapid-antigenic test with serological tests, which are taken 10 days after the start of the tests. symptoms and that with a blood sample, they detect if the person developed antibodies against the coronavirus, but it does not determine whether or not the patient has covid-19.

In the specific case of “rapid” serological tests, López-Gatell reiterated that although COFEPRIS approved ten rapid tests for use in the private sector, the Ministry of Health does not endorse their application for diagnosis, or for epidemiological surveillance by its low specificity and sensitivity to detect antibodies.

On the other hand, the Ministry of Health does recommend rapid antigen tests, which will soon be used for the epidemiological surveillance of covid-19 in the different states. We have a clear disposition in this regard, an enthusiasm for using them on the part of the Government of Mexico City.

We, since October, had highlighted that this is a new technological element that, according to the information available so far, suggests that it may be helpful for monitoring the covid-19 epidemic, “he explained.


Due to the occurrence of 544 new deaths, in Mexico deaths from covid-19 rose to 93 thousand 772.

In addition, there are 544 suspicious deaths with the possibility of a result, 10,680 from which a sample was not taken and 4,285 deaths that will not have a result.

There are 949 thousand 197 confirmed cases of coronavirus, due to the record of 5 thousand 567 new infections.

With regard to suspected cases, there are 186,632 without a sample; 69 thousand 290 with possibility of result and 107 thousand 813 that will not have it.

The estimated active cases are 46,360 and 701,837 people who have recovered from the disease.

Hospital occupancy in general beds is 33 percent national average. In contrast, Chihuahua reported 86 percent. Durango and Coahuila 67 percent.

In beds with a fan the occupancy is 26 percent. However, Chihuahua, registered 83 percent, Aguascalientes 55 and Durango 54 percent.