COVID-19 keeps marching over the earth. More and more people get admitted to the hospital. Some of them are quite all right, others carry the dangerous virus. Your task is to detect the malignant cells before they are released into the air and infect everyone else. Keep track of the patients coming through the main door and destroy COVID-19 particles whenever you detect them. Don’t get your eyes away from the screen even for a second – you don’t want to skip just one gem that will create chaos in the clinic!