How do you say "Stay healthy" in polite form
I'm giving a gift to my 선생님 and I wanted to add a little letter, but since I'm still new to Korean, I'm not sure how to phrase this sentence.
I want to say "I hope you enjoy your gift. Please stay strong and healthy!"

Thank you in advance! 감사합니다

Question

How do you say "Stay healthy" in polite form
I'm giving a gift to my 선생님 and I wanted to add a little letter, but since I'm still new to Korean, I'm not sure how to phrase this sentence.
I want to say "I hope you enjoy your gift. Please stay strong and healthy!"

Thank you in advance! 감사합니다

Answer

"I hope you enjoy your gift. Please stay strong and healthy!"

=> 선물이 마음에 드시길 바라요. 힘내시고 건강하세요.

* 마음에 들다: something is to one's liking. 마음에 드시다 is more respectful as 드시다 is an honorific of 들다.
* 힘내다:  be/stay strong.
* 건강하다: is healthy.  건강하세요:  please stay healthy ( = 건강히 지내세요).