WASHINGTON: In his first 100 days in office, President Biden has overseen ramped up distribution of the Covid-19 vaccine, reached deals for enough shots for all adults, and sent troops to staff mass-vaccination centers as part of an expanded federal effort to vanquish the pandemic.Now, the challenges facing the president have shifted.
The administration is confronting slipping demand for vaccines—complicating efforts to reach herd immunity and a return to normalcy—and a proliferation of cases in countries including India.