<s>
Immuni	B-Application
was	O
an	O
open-source	B-Application
COVID-19	B-Application
contact	I-Application
tracing	I-Application
app	I-Application
used	O
for	O
digital	B-Protocol
contact	I-Protocol
tracing	I-Protocol
in	O
Italy	O
,	O
dismissed	O
on	O
31	O
December	O
,	O
2022	O
,	O
after	O
a	O
long	O
and	O
debated	O
criticism	O
for	O
having	O
been	O
a	O
failure	O
due	O
to	O
the	O
lack	O
of	O
trust	O
placed	O
by	O
citizens	O
.	O
</s>
<s>
Immuni	B-Application
COVID-19	O
contact-tracing	O
app	O
had	O
in	O
fact	O
been	O
downloaded	O
only	O
by	O
12%	O
of	O
Italians	O
between	O
14	O
and	O
75	O
years	O
old	O
(	O
the	O
government	O
had	O
previously	O
stated	O
that	O
,	O
in	O
order	O
for	O
the	O
app	O
to	O
work	O
properly	O
,	O
it	O
should	O
have	O
been	O
downloaded	O
by	O
at	O
least	O
60%	O
of	O
Italians	O
)	O
.	O
</s>
<s>
It	O
makes	O
use	O
of	O
the	O
Apple/Google	B-Application
Exposure	I-Application
Notification	I-Application
system	I-Application
.	O
</s>
<s>
The	O
app	O
was	O
initially	O
release	O
on	O
App	B-Application
Store	I-Application
and	O
Google	B-Application
Play	I-Application
,	O
and	O
since	O
1	O
February	O
2021	O
it	O
is	O
available	O
on	O
the	O
Huawei	B-Application
AppGallery	I-Application
as	O
well	O
.	O
</s>
<s>
The	O
source	O
code	O
was	O
published	O
on	O
GitHub	B-Application
on	O
the	O
25	O
May	O
.	O
</s>
<s>
The	O
app	O
only	O
works	O
in	O
Italy	O
,	O
but	O
compatibility	O
with	O
other	O
European	O
contact	B-Application
tracing	I-Application
apps	I-Application
was	O
a	O
goal	O
.	O
</s>
<s>
Since	O
19	O
October	O
2020	O
the	O
app	O
supports	O
key-exchanges	O
with	O
the	O
EU	O
Interoperability	O
Gateway	O
and	O
is	O
therefore	O
able	O
to	O
communicate	O
with	O
contact	B-Application
tracing	I-Application
apps	I-Application
of	O
other	O
EU	O
countries	O
.	O
</s>
