Positive test for coronavirus SARS-CoV-2, covid-19. Laboratory analysis for home use by yourself. A Caucasian young man holds a coronavirus test WIV04/2019 in his hands. One strip of the test shows a negative analysis. Two stripes- positive. It is easy to find out without a laboratory in the hospital if you have coronavirus: GR, G, GH, O, S, L and V. Strain alpha, beta, gamma, delta, omicron. An important test before vaccination