The merit says "Sunlight halves your Health tracker (rounded up), but otherwise simply removes your vampiric abilities, including all Disciplines and Health benefits, and does no other damage."

What all is included in "your vampiric abilities"? Obviously all disciplines weather through alchemy or affinity. I would assume healing. I would also assume blood surge. But what else? Your constant blush of life as a thin-blood? Your vampiric resilience if you have the merit? Your blood bonds if you have that merit? Your ability to ghoul? Your immortality as a vampire?...