Supplies arrive at a hospital (photo: Michael Appleton/Mayoral Photography Office)

New York City is a "few weeks" away from securing a 90-day stockpile of medical personal protective equipment (PPE) and ventilators, according to Mayor Bill de Blasio’s administration, a project the mayor announced in April as part of a vow to be better prepared for a potential second wave of COVID-19 and other emergencies. But some elected officials and the New York nurses union are questioning the formula behind the 90-day supply benchmarks and whether the stockpile will be adequate for hospitals