ATHENS, Dec. 1 (Xinhua) -- Greece's National Public Health Organization (EODY) had registered 402 diagnoses of new HIV (human immunodeficiency virus) cases between the beginning of 2021 and Nov. 1, 2021, down from 601 diagnoses registered in 2020. The stigma and discrimination surrounding HIV positive persons is still a huge challenge in the country, Greek officials and associations representing patients said on