MANCHESTER, N.H. (AP) — Shania Twain has a respiratory infection so bad she has to sit out a few concerts. Twain says in a statement her doctors advised her to rest for several days. She called off Tuesday’s show in Manchester, New Hampshire, and last night’s show in Albany, New York. The shows will not be rescheduled but refunds will be given. Twain hopes to be well enough to perform tomorrow in Quebec City.