It takes far more than that. IC nurses are trained specifically for the equipment and conditions in an ICU. That takes weeks to orient an RN to IC work. ICU rooms are often "negative pressure" to keep pathogens from going airborne out the door. The safety protocols are more stringent.

The warehouses of beds with ventilators (we hope) we see in NY are not ICU beds by any stretch of the imagination. The death rate will be higher and RNs andMDs are going to get sick.