不是因为受凉了抵抗力降低。 而是另外有两个原因：

来源: yuzt 于 2015-04-19 11:31:12 [] [旧帖] [给我悄悄话] 阅读数 : (424 bytes)
回答: 冬天为啥容易感冒？ 由 viewfinder 于 2015-04-19 11:13:07

There are two main theories for why cold and flu season peaks in winter:

(1) When a person with a respiratory virus coughs or sneezes, the virus escapes the host via a small droplet. In colder months, the virus can more easily remain in the air to infect another person.

(2) the more people stay indoors or in school, in close contact, the more chances viruses get to spread,

所有跟帖： 

• 此是事实，但不是原因。 -孤舟渔翁- ♂ 给 孤舟渔翁 发送悄悄话 孤舟渔翁 的博客首页 (0 bytes) () 04/20/2015 postreply 20:57:00

请您先登陆，再发跟帖！