When the world scientists are racing against time to develop vaccines, a Chinese firm announced they have built the world's largest vaccine plant with the annual capacity reaching 100 million doses. The Fourth Construction Co., Ltd. of China Electronics System Engineering made the statement on Monday, claiming a production facility with bio-safety level 3 (BSL-3) is ready to mass produce vaccines once one has been proven to be safe and effective. According to global standards, BSL-3 is used for work involving microbes which can cause serious and potentially lethal disease via the inhalation route, for instance, the respiratory diseases like SARS, MERS. This type of work can be done in clinical, diagnostic, research, or production facilities. As one of the contractors constructing a BSL-3 production facility, the Hebei-based com...