Dr. Gopi Patel recalls how powerless she felt when New York¡¯s Mount Sinai Hospital overflowed with COVID-19 patients in March.

Guidance on how to treat the disease was scant, and medical studies were being performed so hastily they couldn¡¯t always be trusted. ¡°You felt very helpless,¡± said Patel, an infectious disease doctor at the hospital. ¡°I¡¯m standing in front of a patient, watching them struggle to breathe. What can I give them?¡±

While there is still no simple answer to that question, a lot has changed in the six months since an entirely new coronavirus began sweeping the globe.