You have to take tamiflu when you first get it within 24-48 hours. You can’t wait until it gets bad.
I think they are only giving it to high risk patients now.
Yes, I do think it's being sort of rationed until they know how much they'll need in the colder months when the most people are normally infected with flu viruses. They have a big supply, but maybe not for a serious pandemic in the normal heavy flu months.