Biden’s plan to vaccinate the world faces an obstacle: Vaccine manufacturers

“Unlike our oral antiviral, which is a small chemical molecule, high-quality vaccines are large biological molecules that require consistent biological production. It is an extraordinarily complex process under any circumstances, and even more so during a pandemic,” Kit Longley, a media representative for Pfizer, told The Post this week, adding that failed vaccine manufacturing could waste resources and cause lapses in consumer trust.