As Molly Howell, a state health official in North Dakota, watched a webinar on how to distribute what’s expected to be the US’s first Covid-19 vaccine, her head began to spin.

“How are we going to do this?” she texted a colleague who was also on the webinar.

Her colleague responded with an exploding head emoji.

On Monday, Pfizer announced that initial Phase 3 clinical trial results show its vaccine is more than 90% effective. If approved, Pfizer’s vaccine will also be the most fragile vaccine used in the United States, and the state health officials …continued .
[Original Source: CNN]