@VanGennepD @i_petersen There's a big difference between asymptomatic and not knowing one had covid (infection). Many symptoms are ambiguous and might be attributed to something else or ignored.
@VanGennepD @i_petersen 无症状和不知道有covid（感染）之间存在很大差异。许多症状是模棱两可的，可能归因于其他原因或被忽略。