In Chinese folk religion,
瘟神 refers to spirits that spread disease - most famously the
五瘟使者 (Five Plague Emissaries) who each governed a season. Traditional
送瘟神 ('see off the plague god') rituals at the end of festivals were meant to drive disease out of the village. Mao Zedong's 1958 poem
《送瘟神》 used the image to celebrate the campaign against schistosomiasis.