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Scientist looking at test tube in the laboratory at the university
Science, chemistry, biology, medicine and people concept - close up of young female scientist holding test tube making research in clinical laboratory
Scientific researcher holding at a liquid solution in a lab
Close-up of glass tube with blue fluid in nurse hand during medical test.
The doctor is wearing a respiratory mask with a positive blood test for a new rapidly spreading coronavirus SARS-CoV-2originating from Russia, Kommunarka. The doctor holds a test tube COVID-19
A Nurse dials the injection into the syringe, vaccination
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