A British patient has died after the longest COVID infection on record — regularly testing positive for a staggering 505 days.

The unidentified patient, who had a weakened immune system, succumbed after suffering “one continuous infection” that lasted nearly 17 months, according to Dr. Luke Blagdon Snell, of Guy’s and St Thomas’ NHS Foundation Trust.

COVID throat-swab tests “were positive each time — the patient never had a negative test,” Snell told the BBC, as per The Times of London.