According to the World Health Organisation (WHO), wearing a face mask is an added precautionary measure to limit the spread of coronavirus. It asserts that masks are effective only when used in combination with frequent hand-cleaning with alcohol-based hand rub or soap and water. If one wears a mask, then one must know how to wear it, use it and dispose of it properly for keeping the infection at bay. Here is how it should be done, as recommended by WHO.