Kuwedzera munyika dzichiri kusimukira pakati pa1970 na2000s kunofungidzirwa kuti kwakabatana nekuwedzera kwehuwandu hwekusvuta munzvimbo ino, huwandu hwevanhu huri kuwedzera uye huwandu hwevanhu vari kuchembera nekuda kwekufa kushoma kubva kune zvimwe zvikonzero zvakaita sezvirwere zvinotapukira. Dzimwe nyika dzakasimukira dzakaona huwandu hwakawedzera, dzimwe dzakaramba dzakagadzikana uye dzimwe dzakaona kuderera kweCOPD. Nhamba dzenyika dzinotarisirwa kuramba dzichiwedzera sezvo zvinhu zvine njodzi zvichiramba zvakajairika uye huwandu hwevanhu huri kuramba huchikura. Pakati pa1990 na2010 huwandu hwevakafa kubva kuCOPD hwakadzikira zvishoma kubva pamamirioni 3.1 kusvika pamamirioni 2.9 uye rufu rwechina muna 2012.
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