Most pharmacies and pediatricians received their stock of this year’s flu shot in August, with urgent care centers and other primary care providers getting their stock in September. The new COVID-19 booster is reported to arrive at immunization locations by mid to late September. As far as the new RSV immunization—it was only recently approved by the FDA and recommended by the CDC. They expect fall availability as well, but you will need to check with your doctor or local health department for specific details.