Here are my thoughts. My church surprised me at the mass today with the same practices encouraged, i.e. try not to shake hands, no holy water, etc. I wasn’t aware this was a trend happening in many parishes until that moment.
Anyways, I listened to my priest, and the wording of our bishop’s message was “I encourage you to do the following…” so not a binding order or anything. It seems more like an individual judgement for receiving communion tongue or hand depending on circumstances. Given I live on Vancouver Island and there’s no cases here at the moment, and only like 12-ish in Vancouver, plus no one in my tiny parish has been to China at all recently, I viewed it as still appropriate to receive on the tongue if I wished, so I did. My priest seemed to have no problem with this.
I don’t really think on it as a moral matter, given both ways should still be fine to receive. We’re all going to die sometime, Coronavirus or not, so let’s not waste time arguing about this

If Coronavirus comes, then I guess we’ll be in Heaven sooner! So let’s not burden ourselves with the way we receive Him,
so long as we receive Him with utmost love, respect and gratitude for entering into us . I have always received Jesus on my tongue, as I do believe this reminds me that I’m receiving God, that His body is sacred and He has made Himself completely vulnerable to me. That, plus I always feel my hands are dirty.
Speaking as a nurse, I’ve further thought on it, and though it does truly disturb me to receive on the hand myself (think about the respect Jews had by not daring to touch the Ark of the Covenant) there is just reason for receiving on the hand at this time. In my diocese it’s more of an “encouragement” than strict practice since we don’t have it here, but I imagine I would respectfully receive on the hand if Coronavirus comes to my little island since it is quickly becoming a pandemic and it indeed can spread via respiratory secretions. I’m not really picky about myself getting it or not, as I’m young so I can get by, but I would do so out of respect to others, and to the priest I think. Keep in mind, you can still get it as long as you are within 3 meters of someone who is infected and breathing in your general direction, so technically we’re at just as much risk receiving it in the hand as via tongue, especially if it’s truly airborne like they suspect in China.
Also, keep in mind Communion is truly the Bread of Life, the spiritual nourishment of our souls, and if we are potentially going into a situation where they close churches, we need as much spiritual nourishment from Jesus as possible before it gets taken away. So do not refrain from receiving if you must take it in the hand. He loves us, and understands our hesitation, and still wants to be with us. Personally, I would receive in the hand like the early Christians did: Both hands together, allows the priest to place the Body of Christ into your hands, bring your head down to your hands, touch your tongue to the Eucharist, and receive Him.