Seems like "good old" influenza decided to stick around for a while whereas H1N1 chose to retire for now.

In Hello Project's Berryz Koubou,5 members(Tsugunaga Momoko, Natsuyaki Miyabi, Sudou Maasa, Sugaya Risako, and Shimizu Saki) caught the flu,effectively ending this week's concert of theirs.5 out of 7 members with flu.And seeing how H!P have subgroups like Bruno and Guardian 4 ... spreading the influenza over to C-ute and Morning Musume does seems highly possibleeeeeeeeee ....................... let's hope not.