Dr Mahathir Mohamad continues to discuss political matters even when hospitalised for a lung infection, according to Bersatu president Muhyiddin Yassin.

Muhyiddin had visited the former premier at the National Heart Institute in Kuala Lumpur on Monday.

“(He) looked healthy and jovial.

"It's just that I gave him a little bit of advice, not that I'm a doctor, but as (party) president. I told him to take some time to rest. There are many other leaders who can manage the party affairs...