How do you say your are sick in Russian?

There are a few ways to say "you are sick" in Russian, depending on the context and level of formality:

Formal:

* Вы больны. (Vy bol'ny.) - This is the most formal and direct way to say "you are sick."

* У вас болезнь. (U vas bolezny.) - This means "You have an illness."

Informal:

* Ты болен. (Ty bolen.) - This is the informal way to say "you are sick" to someone you know well.

* У тебя болезнь. (U tebya bolezny.) - This means "You have an illness."

* Ты болеешь. (Ty boleesh.) - This means "You are getting sick."

More colloquial:

* Ты нездоров. (Ty nezdorov.) - This means "You are unwell."

* Ты приболел. (Ty pribolel.) - This means "You are slightly ill."

Note: The word "болен" (bolen) is masculine. For women, use "больна" (bol'na).

The best way to choose the right phrase is to consider who you are talking to and the situation.