These are unprecedented times.
To survive, passenger airlines should utilise their aircraft to carry freight (medical supplies, sanitizer, ventilators, etc). Some are already doing so.
Below are two sample loadsheets. One has 189 passengers (all seats occupied). The other has the equvalent weight of cargo on seats. This just for demonstration purposes. In both cases there is cargo in holds 3 and 4, and the crew and fuel are the same.
For spacing, every other row of seats could be removed. Nets would be used to secure the cargo, and plastic wrap as protection.
