H1N1 had a lower infection rate than Covid-19. It was related to the flu so older people had a greater natural immunity to it and it mostly affected those who were younger (so naturally more able to make a full recovery in general).
I don't think it's odd that people are stockpiling. If everything has to shut down for 2 weeks (minimum) to get on top of this outbreak then people need to be prepared, and most people over prepare which is just human nature, especially seeing as we don't know when, or even if that might need to happen. I don't need to worry about access to toilet paper (though even here in New Zealand people have been going overboard) but every time I read about people stockpiling toilet paper it does make me wonder if I have enough and I do get the urge to get more. So far I'm trying to be sensible.
In the last 10 years we have really become an even greater global community and the awareness of how bad and how quickly and how easily diseases can spread and become critical is even more at the forefront of peoples minds. Diseases can spread so quickly because we are a global community with millions travelling all over the globe daily (or formally so). It's so easy to go anywhere, taking all your bugs with you and spreading them around wherever you go.