This is the latest update, valid until January 30th>
https://www.gob.pe/institucion/pcm/n...5-005-2022-pcm
Basically the difference from the changes in november 2021 is that negative PCR test validity is for results within 48 hours from embarkation.
You can still enter with just the full vaccination certificate (1 or 2 doses) +
Health declaration form
For
domestic flights, booster shots for those over 50 will also be required (begins on Sunday 1/23)
for updated info you can check
VUELA FACIL