1. Gross skeletal alterations affecting the upper airway (eg.micrognathia)

2. Unstable chronic medical conditions known to affect OSA (CHF, stroke) 3.

3. Pregnancy or intent to become pregnant within the period of the protocol

4. Inability to sign informed consent form

5. Habitual snorer or previous diagnosis of OSA.

6. Less than 18 years of age.

Obstructive Sleep Apnoea Post Covid 19: Role of the Upper Airway Microbiome