观察你周围是否有人患上链球菌咽喉炎。 回想症状出现的速度。 量体温。 注意是否感到头痛。 观察消化症状。 留意身体是否感到疲惫。 留意是否出红疹。 注意你没有的症状。

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
The infection is contagious and is spread through direct contact with the bacteria that causes it. It is unlikely that you will develop strep throat without having had direct contact with someone who is infected.  It can be very difficult to know if someone else has strep. Unless you have been isolated completely, you probably could have come in contact with someone who has the infection. It is also possible for individuals to carry and pass on strep without having symptoms themselves. A sore th