Double Olympic 200 metres gold medallist Veronica Campbell-Brown insists she will not be affected by the discredited drug allegations which threatened to ruin her career.

The 32-year-old Jamaican was cleared by the Court of Arbitration for Sport (CAS) in February after initially receiving a two-year suspension when she tested positive for the diuretic HTC in May 2013.

Campbell-Brown was cleared of failing a doping test, CAS said, because of blatant flaws in the collection procedures in the Jamaican capital Kingston and possible “environmental contamination” of her urine samples.

The Olympic champion in Athens in 2004 and again in Beijing four years later was initially suspended by the IAAF and was unable to defend her 200m title at the 2013 World Championships in Moscow.

But Campbell-Brown, who has always denied intentionally taking a banned substance, says she has put the episode behind her and is now fully focused on next year’s World Championships in Beijing.

“I had a very good 2014 season and I do not dwell in the past,” Campbell-Brown said.

“It is behind me and I’m moving forward after what I achieved last season.

“It is always difficult when negativity comes into one’s life, but I’m very pleased for the support I’ve received.

“Everyone is fully behind me, what happened was not helpful, but it won’t hinder me next year.”

Campbell-Brown expects a strong performance from Jamaican sprinters at Rio 2016 where Usain Bolt should be seeking a third sprint double as well as a third relay gold in the 4x100m.

“I don’t know how much better Usain can get but he’s done a lot for track and field over the last few years,” Campbell-Brown added.

“It’s a blessing that we have so many talented athletes in the sport and it definitely motivates kids in the country because they have other athletes to look up to.

“They realise that they are capable of achieving anything and what we have done on and off the track is a great help to influence young athletes to strive for success.”