I am unable to get my second shingles shot. Every place I called says they do not have it in stock. Why? What should I do?

Auto tag agency

9110 Red Branch Rd STE N, Columbia, MD 21045, USA

Grocery store

7200 Cradlerock Way, Columbia, MD 21045, USA

Grocery store

8620 Guilford Rd, Columbia, MD 21046, USA

Eye care center

Medical Pavilion at Howard County, 10710 Charter Drive, Suite #310, Columbia, MD 21044, USA

Medical clinic

9650 Santiago Rd STE 109, Columbia, MD 21045, USA

Medical clinic

5450 Knoll N Dr, Columbia, MD 21045, USA

Dental clinic

5500 Knoll N Dr #370, Columbia, MD 21045, USA

American restaurant

10150 Shaker Dr, Columbia, MD 21046, USA