To better appreciate the role of the macro-level influences on patient presentations, Chinese physicians of the past paid close attention to the shifting dynamics of environmental factors commonly referred to as wu yun liu qi（五運六氣wǔ yùn liù qì）. This article takes a closer look at the overlay of key environmental factors from last November through the present according to the ancient system of wu yun liu qi in order to shed some light on the mechanism of the current outbreak of Covid-19, effective herbal strategies for its treatment and most importantly, its prevention.

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