January 19, 2022 Flu Vaccine Vouchers Through PA 211 United Way Worldwide in partnership with Walgreens has started the SingleCare Flu Vaccination Program, which will provide free flu vaccine vouchers for individuals who are uninsured. About Vouchers will be sent electronically to an email address so access to a working email is necessary. There is a limit of one voucher per person and each voucher will have a unique ID number. However, multiple vouchers can be sent to the same email, so the whole family can receive their flu vaccine vouchers at one email address. Note that the voucher can only be redeemed at Walgreens locations. Get a Voucher To receive a flu voucher, call 2-1-1.