HELP: nan fill color on a map can be transparent?

[AlineGobbi]

i have this code, but i want to know if i can make nan values don't show nothing, be transparent ?

m = merged2.explore(
column="Total de pacientes",
tooltip=["DISTRITO", "Total de pacientes"],
popup=['DISTRITO','Total de pacientes','CDI 1','CDI 2'],
tiles=None,
cmap="Reds",
style_kwds=dict(color="black", weight=0.2),
legend=False,
nan_fill_color = 'blue',
name='[Mapa 1] Total de pacientes dos CDIS'
)