Comparison	Benefit	Risk	Cost-burden	Quality	Strength
Air cleaners with HEPA filtration only	Uncertainty in the estimates of benefits	No known risk to using in-room air cleaner with UVGI and HEPA filtration	Higher - Maintenance of UVGI lights - Purchase of new UVGI lights yearly - Higher energy usage	Low An estimate of effect is uncertain.	Weak recommenddation; alternatives may be equally reasonable.