A virus is a non-cellular infectious agent that can only reproduce inside living cells. Viruses infect all types of organisms, from humans, animals, plants to bacteria.
Coronavirus infection COVID-19 is an infectious disease caused by a new strain of the SARS-CoV-2 virus, which was identified in December 2019.
COVID-19 is spread between people by airborne droplets through direct contact or through the air at a distance of about one and a half meters from each other. After infection, symptoms of COVID-19 may appear within two weeks, mainly fever, cough, shortness of breath. Other symptoms include a runny nose, loss of smell, headache, weakness, diarrhea, and nausea. It is believed that the elderly, pregnant women, people with chronic diseases, smokers are at increased risk.
Asymptomatic carriers of the virus are also common, with children and young adults being the most common carriers. They can transmit the virus to other people through contact without developing symptoms of the disease themselves.
The considered laboratory study in medicine is called the polymerase chain reaction (PCR). According to official data, with the help of a modern device, the results of such a study should be ready no later than 5-6 hours.
PCR research - a high-precision method of definition of a virus. This is an analysis of genetic material (DNA and RNA), which determines the presence of a virus in the body at a very early stage. Biomaterial for research is taken from the nasopharynx.
IgM antibodies are produced in the body in response to COVID-19 infection, they start to be produced first, then their level begins to rise rapidly and reaches a maximum during the acute period of the disease. By the time of recovery, these antibodies disappear. Antibodies IgG Indicate the immune status of a person to the virus. Biomaterial for ICLA research is venous blood.
The presence of IgG antibodies indicates that either the disease is at an advanced stage, or the person has had this viral infection in the past and has developed immunity to this viral disease. The biomaterial for ICLA research is venous blood.
What can influence the result?
For IgM: false-negative result (infection is present despite a negative test): serological window period between days 5-7 and 10-14 in indolent infection without significant viral replication (negative PCR) and before the production of immunoglobulins G ; a false positive result, that is, a positive IgM test in the absence of the SARS-CoV-2 virus in the body - with autoimmune diseases (systemic lupus erythematosus, thyroiditis, etc.), HIV infection.
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