Mouth Odor on Preventing Pneumonia by Oral Frailty

The patients will be required to perform oral exercises and maintain oral hygiene twice a day. The investigators will assess their oral frailty, oral bacteria, oral odor, and other related clinical care data on the following time points: day 1 of hospitalization, day 3 of hospitalization, the day of discharge, one week after discharge, and one month after discharge.

The patients will be required to maintain oral hygiene twice a day. The investigators will assess their oral frailty, oral bacteria, oral odor, and other related clinical care data on the following time points: day 1 of hospitalization, day 3 of hospitalization, the day of discharge, one week after discharge, and one month after discharge.