March 2022, ScientificAmerican.com 47
Tommaso Ausili/Contrasto/Redux PicturesITALIAN ARMY
nurse helps a
COVID patient
at a camp hospi-
tal in Perugia
that was opened
to relieve the
burden on
nearby Santa
Maria della
Misericordia
hospital.
In December
of 2020, the
world continued
to struggle with
the pandemic’s
successive waves.