In the United States, confirmed cases of COVID-19 have been recorded at least since the beginning of January 2020. Scientists have suggested that the virus was already circulating in the country in December 2019.
“Testing of samples < … > shows a very limited number of cases of SARS-CoV-2 infection in five US states as early as January 7, 2020,” the article notes.
The researchers called the findings another “piece of the puzzle” about the beginning of the coronavirus pandemic. The NIH believes that the information proves the presence of the virus in the United States at the end of December 2019.
Before vaccination against SARS-CoV-2, doctors recommend stopping taking antihistamines. Experts believe that such drugs can smooth out the symptoms of anaphylactic shock from the vaccine.
Before getting vaccinated, a person needs to consult with doctors. Especially if he takes drugs that suppress the immune function. These include allergy remedies.