Complications with supplies coming in from China are chiefly cited as the primary reason. But it also has to do with the United States’ Strategic National Stockpile (SNS). This was put in place by the George W. Bush Administration as a short-term safety net in the event of an attack of bio-terror. It wasn’t, however, designed to handle an event the scale of a nation-wide pandemic. These supplies were depleted in February of 2020 and the country simply hasn't been able to keep up since.