Pause comes after federal recommendation about Johnson & Johnson single-dose vaccine Gardner News GARDNER — The city’s plan to begin delivering COVID-19 vaccines to residents in their homes has been put on hold for the time being. City officials announced on April 13 — the date the Homebound Vaccination Delivery Program was scheduled to begin — that the service was being placed on hold after federal health authorities recommended that clinics temporarily halt distribution of the Johnson & Johnson COVID-19 vaccine until an investigation into very rare potential blood clots associated with the vaccine is completed. The city’s home delivery program had intended to utilize the Johnson & Johnson single-dose vaccine.