FULL MASK INDEED
My own measures against the COV. * Full mask when entering a crowd. 进入人群时完全戴口罩。 * Increase the indoor humidity & ventilation appropriately if the lungs are infected. 如果肺部感染，适当增加室内湿度和通风。 * Keep the spine straight to clear the bottom-up waterway. 保持脊柱笔直以通畅自下而上的水道。 - Not a suggestion to others.