Scarlet fever is highly contagious.

猩红热的接触传染性很强。

They have lost their only son through scarlet fever.

他们失去了独生子，他是患猩红热死的。

It looks like scarlet fever.

好像是猩红热。

It looks as if it's scarlet fever.

看起来这好像是猩红热。

He's got scarlet fever.

他患了猩红热。