にかかったことがない

have never had

→ に
phrase Rare #40,444
have never had Used after an illness or condition to mean “have never suffered from” it, and after 医者 to mean “have never seen a doctor.”
JA: 私はまだインフルエンザにかかったことがない。
EN: I've never had the flu.

今まで重い病気にかかったことがないって、本当なの

Is it true that you've never had a serious illness before?

彼は医者にかかったことがないのが自慢

He is proud that he has never had to see a doctor.

うちのおじいさんは生まれてから医者にかかったことがない

My grandfather has never seen a doctor in his entire life.

父は今までに病気にかかったことがない

My father has never been sick before.