Original sentence: He compared the spreading of narcotics within the society to the spreading of any form of infectious disease, stemming from intimate personal contact.However the conclusion have been criticized as fundamentally biased in favor of repressive drug laws, when it picks Sweden among quite a few countries with low prevalence rate.Instead zero tolerance against single drug use gradually evolved under the influence of Nils Bejerot and his findings on epidemic drug use.Other long standing problems noted is the high numbers of problem drug users and the mortality rates among Swedish drug addicts are comparably high.That marked a shift from a more liberal view on drugs and drug use, where personal use was of low priority and the resources were focused against supply.The United Nations Office on Drugs and Crime hails Sweden as a successful example on drug policy, with a low drug prevalence rate among the population.The modern Swedish drug policy stems from a decision by the Riksdag in 1978 were illict drug use was deemed as inconsistent with Swedish culture and that the goal of the drug policy shold be a drug-free society.To stop this from happening, these infectious users have to be identified and separated from the rest of the society so that they can't spread there habit
Edited sentence: Sweden has a zero tolerance policy for use of illicit drugs, including cannabis, combined with a very low proportion of the citizens imprisoned for drug offenses (compared with the US).The United Nations Office on Drugs and Crime reports that Sweden has one of the lowest drug usage rates in the Western world, and attributes this to a drug policy that invests heavily in prevention and treatment, as well as strict law enforcement  <ref