* Global HIV/AIDS fight 'knocked off track' by COVID-19 * Testing rates fall, treatment targets missed * Experts say creative solutions help avert bigger setback By Benjamin Ryan and Kim Harrisberg NEW YORK/PIETERMARITZBURG, South Africa, Oct 18 (Thomson Reuters Foundation) - S outh African domestic worker Mabuyi Dlamini always dreaded the bumpy, day-long minibus journey she had to make each month to pick up her HIV medication from the nearest clinic in KwaZulu-Natal province.