Environment, General, Global Views, Health Latina Lista correspondent finds Mexican stores running low on surgical masks May 1, 2009, 4:12 PM 1 By Mariana Llamas-Cendon LatinaLista MEXICO CITY — Surgical masks and respirators have become a popular shield against the swine flu or H1N1 virus pandemic but they are not almighty. According to a story published on Esmas.com, the news website…