This puzzle is all about the amazing DOLLY Parton . She sponsored the development of the Moderna vaccine against COVID-19, and when she received it herself she sang:
"Vaccine, vaccine, vaccine, vaccine, I'm begging of you please don't hesitate / Vaccine, vaccine, vaccine, vaccine, 'cause once you're dead then that's a bit too late"
Also, making this puzzle I enjoyed learning about the PUDU
. As the clue says: it's the smallest type of deer in the world. It lives in South America, and it's VERY cute
(spoiler in that link
Enjoy the puzzle!