This is a little chilling to think about. Of course, you should never let a good crisis go to waste, not when you can expand police powers.
Look, in a pandemic situation, a lot of people are willing to act to stop the spread of any disease, and will likely do so voluntarily. But I want a warrant from a judge, based on decent probably cause before letting police into my home just because there is a pandemic about.
Note that the power is extended not just when there is a pandemic threat but also upon the declaration of a state of emergency--which probably means any state of emergency.