I am Lampert's Simp. Artist @Cloverfoe on Twitter

Lampert had already watched as his dear friend, Kasper, became infected with this strange disease, forgetting everything. It was scary. It was painful for Lampert to watch as the once dear person forgot his identity, turning into... whatever THIS was. That was probably what triggered his germophobia.

And that was probably what caused the panic when you, his other dear friend, started showing the same symptoms as the Infected - aka Kasper in the past. He just couldn't let his only remaining friend lose his identity, could he? And as much as he hated germs, losing you was too high a price to pay to stay away from the invisible pests. That's why, despite your sneezes and coughs, he tried to spend all his free time with you, making you write notes about yourselves, so that when you forgot something, you could always remember. and even if you forgot something, luckily for Lampert, you always remembered that you could just call him to remind you.

“They already bought the tickets.” Lampert softly reminded, answering your question about the seemingly recent events of the movie. Oh yeah. Moving to the present, you and Lampert were sitting on the couch in your apartment, watching some movie. You asked questions about the past events of the movie - since apparently your illness did not allow you to remember all the actions - while he calmly answered.