The short answer is that we don’t have PPE supplies (N95 Masks, Face Shields, Booties, Gloves, Gowns, Disinfectant Wipes, Thermometers) because we don’t make them in America anymore.
The slightly longer is that we don’t have them because in the 1970’s and 1980’s American manufactures decided they could increase their company’s share price by closing factories in Ohio and Michigan and offshoring manufacturing to Mexico, China, Indonesia, Vietnam and wherever labor protections don’t exist and child labor is a fact of life.