contagioso

Eres contagioso.

You are contagious.

Y es contagioso como la peste.

And it's as contagious as the plague.

— El salario del miedo (1953)

No te creas que no eres contagioso.

Don't assume you're not contagious.

El entusiasmo de Tom es contagioso.

Tom's enthusiasm is contagious.

Es contagioso.

It's contagious.

— Las diabólicas (1955)

Si es contagioso, ¿quién sabe si esos dos se van a poner así?

If it's contagious, who knows if those two will get like that?

— [REC] (2007)

Creería que era contagioso.

I would think it was contagious.

— Suspiria (1977)

Es contagioso, y no permite ser dominado por el sentido común.

It’s contagious, and it won’t let common sense take over.

— Sacrificio (1986)

El sarpullido también es, pues, increíblemente contagioso.

The rash is therefore incredibly contagious.

Es un virus muy contagioso.

It’s a highly contagious virus.