Six months on since the virus was first discovered in one of the blood banks of Shemkent, thousands of children across the country are still being tested.
此段出自一段新闻。原文大意是：哈萨克斯坦医疗机构因渎职导致众多人口因输血感染HIV病毒。Shemkent是该国一城市名。不知这个on怎么理解，怎么翻译？
參考答案:on 这里是持续的意思，Six months on持续了六个星期．
