VIENTIANE, Jan 12 (Xinhua): Local authorities have been urged to monitor border crossings to prevent people from entering Laos illegally from Thailand, to stem the spread of Covid-19 after a widespread outbreak in Thailand. Many Lao workers are returning home from Thailand, both legally and illegally, sparking fears of a second wave of Covid-19 in Laos, local daily Vientiane Times on Tuesday quoted Deputy Director General of the Department of Communicable Disease Control under the Lao Ministry of Health, Phonepaserd Sayamounkhoung as saying. "The taskforce and health authorit...