The following links don't work:

• 428071000124103 Current Heavy tobacco smoker  
• 428061000124105 Current Light tobacco smoker

... the concepts don't appear in the international edition provided by the link.

Other concepts exist:

 Heavy cigarette smoker (20-39 cigs/day) (finding)

 https://browser.ihtsdotools.org/?perspective=full&conceptId1=160605003&edition=MAIN/2020-03-09&release=&languages=en

Occasional tobacco smoker (finding)

https://browser.ihtsdotools.org/?perspective=full&conceptId1=428041000124106&edition=MAIN/2020-03-09&release=&languages=en
 

SCTID: 428041000124106