Liturgical advice in the Coronavirus age (except for Mass cancelation and locking churches) is what we practiced in the pre-Vatican II Church:
1. Priests not interacting with parishioners before or after Mass because they were praying priestly devotions before and after Mass!
2. Laity not interacting with each other before, after or during Mass and if possible spreading themselves all over the church especially for daily Mass (remember priests forcing laity to sit up front in a tighter group and bringing them around the altar for the Liturgy of the Eucharist).
3. No common chalice
4. Less frequent Communion but at least in the pre-Vatican II Church it was because of unrepentant or unforgiven mortal sin, now its about a virus.