The start of flu season is still weeks — if not months — away. Yet marketing of the vaccine has become an almost year-round effort, beginning when the shots become available in August and hyped as long as the supply lasts, often into April or May.
Not that long ago, most flu-shot campaigns started as the leaves began to turn in October. But the rise of retail medical clinics inside drug stores over the past decade — and state laws allowing pharmacists to give vaccinations — has stretched the flu-shot season.
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