Rumor identification: There is no evidence that moxa smoking can prevent neoconjunctivitis. Rumor analysis: 1, moxa is a herb with blood circulation and blood stasis, moxa leaf smoke in the volatile oil, in general the heat generated by the burning of moxa, can play a warm meridian, moving Qi and blood, to drive away the cold and dehumidification effect. 2, after the new coronary pneumonia epidemic came out, there are many people spread a lot of prescriptions to prevent new coronary pneumonia, one of which is to smoke moxa, but so far there is no evidence that moxa has a disinfecting effect on the new coronary virus, so do not follow it blindly. In addition, moxa burning in a closed room may also cause carbon monoxide poisoning, which is detrimental to human health. Special Note: There is no evidence that moxa smoking is effective in preventing novel coronavirus infections. Although Chinese medicine believes that the heat generated by burning moxa can warm the meridians, move Qi and blood, expel cold and remove dampness. There is no scientific evidence to prove that moxibustion is effective in the prevention and elimination of novel coronaviruses, but the evidence to date is weak as to whether moxibustion can enhance immunity.