![3- Physical factors. Poor ventilation Ventilation is the way fresh air moves into a room or building, and how old and polluted air moves out. Poor ventilation. - ppt download 3- Physical factors. Poor ventilation Ventilation is the way fresh air moves into a room or building, and how old and polluted air moves out. Poor ventilation. - ppt download](https://images.slideplayer.com/26/8539981/slides/slide_3.jpg)
3- Physical factors. Poor ventilation Ventilation is the way fresh air moves into a room or building, and how old and polluted air moves out. Poor ventilation. - ppt download
How does bad ventilation spread Covid? Govt's principal scientific advisor explains | Latest News India - Hindustan Times
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