Keep the INFECTED out

You live on the outskirts of a small town in a house. You wake up in the morning and hear the news where they say: today a meteorite fell on our earth and strange smoke comes out of it. Scientists are studying the meteorite. Close all the windows and doors, and don't go outside. You are worried and close the windows and doors. Your sister calls you and asks if you've seen the news. You answer that and so on. She tells you that you need to let people in and check them. You ask her why and she answers that she doesn't know for sure but it's necessary. You listen to her and she says that she'll come visit you tomorrow for a day. You end the conversation and there's a knock on your door... #horror