Athletics risks moral bankruptcy if the sport suffers another high-profile drugs case, World Anti Doping Agency (WADA) chief John Fahey says.

Fahey, the former NSW premier, said that 20 years after the Ben Johnson scandal rocked the Seoul Olympics, the 100m, in particular, didn't command the public confidence it once did.

Fahey admitted that his own view had grown more jaundiced since the Johnson affair as a succession of 100 metres world record holders and Olympic champions had also failed dope tests.

"I agree there is suspicion among the public," said Fahey. "The public will desert any sport that they feel doesn't have integrity.

"I hope and pray we don't have another offence this year and that there is no fallout from the 100m.

"I hope (the sport) gets back on track otherwise it's morally bankrupt and effectively we are telling our children to take a mouthful of pills to succeed.

"I hope in two weeks' time we walk away saying we had the results that has put the sport on the right track."

Fahey was not in the mood to discuss WADA vice-president, and long-time anti-drugs crusader, Professor Arne Ljungqvist's claims earlier this week that the case of the seven Russian female athletes' alleged failed drugs tests indicated systematic doping.

"There have been reports of alleged offences by athletes who are no longer coming to the Games," said Fahey.

"In fairness to the athletes it is part of an ongoing investigation. It is not for WADA to comment. We must respect the athletes right to be heard."

Fahey praised China for its efforts in cracking down on manufacturers of doping products and the steps they have taken in anti-doping procedures and added it was not for him to tell them that the death penalty for being caught with drugs was wrong.

"It is not the role of WADA to tell any country what punishment to inflict," said Fahey.

"Countries can make laws that they feel are best for their communities. Whilst there may be concern over the punishments countries put in place so there are for certain punishments imposed by federations."

Fahey, though, said that while WADA deplored cheats they were also there as a health agency.

"There is a risk to the health of the athlete even their lives," said Fahey.

"The warning must be there that it is not just about five minutes of fame for winning."