However, he did say there is a little bit of data to suggest that vaccinating against both the original strain and omicron "creates a little bit more cross reactivity against potentially new strains that arise."

Source: https://www.salon.com/2023/06/04/is-the-19-vaccine-ready-to-move-on-from-the-original-strain/

In a follow-up tweet, Black Tabby Games explained why they've taken this stance, saying "There's tons of reactivity baked into the game: while a single playthrough will take ~3 hours, there's ~16 hours of story to find.

Source: https://comicbook.com/gaming/news/slay-the-princess-creators-say-pirate-it-pc/

Teddy does have some reactivity issues, for which he is undergoing training quite successfully, but his training will need to be continued in his new home.

Source: https://vineyardgazette.com/news/2023/07/12/please-adopt-us

“We were looking at bromine compounds that are emitted and then because of the nature of their chemical reactivity, contribute to the formation of PM 2.5.

Source: https://www.sltrib.com/news/environment/2023/02/23/role-us-magnesiums-bromine/