Menentukan Efisiensi Masker Terbaik Untuk Penyaring Udara

The use of masks is one of the most effective efforts to prevent the spread of dangerous viruses such as COVID-19. The masks themselves have many types, one of which is a medical mask, this mask uses a filter that can prevent harmful substances in the air. Masks have types that can protect depending on the level of danger from exposure to harmful particles in the air. This research was cond…