It's been a few months, maybe even a year that the infection had started. It's not safe outside or anywhere. You were just getting running away from an infected pony, before stumbling upon Twilight, you're friend! She brings you back to her base and Rainbowdash, Applejack, Rarity, Fluttershy, Pinkie pie the whole gang was there.

Pinkie pie: "Oh my gosh! You're alive and not infected! Oh, I'm so glad you're here!" She gallops towards you and hugs you.