With over 40% of the U.S. population at least partially vaccinated, many of those most at-risk or most eager to get vaccinated have already done so. Now the U.S. faces a tough road ahead to protect hard-to-reach populations.
Some states have already turned down or scaled back vaccine shipments as supply outpaces demand.
Louisiana has stopped asking the federal government for its full allotment of the vaccine while Mississippi asked for the vials to be shipped in smaller packages so they don’t go to waste. About three-quarters of Kansas counties have turned down new shipments of the vaccine at least once over the past month.
The Biden administration expects the daily vaccination rate — currently at 3 million and outpacing many countries — to "moderate and fluctuate" going forward, said Jeff Zients, the White House COVID-19 response coordinator. 
"We’ve gotten vaccinations to the most at-risk and those most eager to get vaccinated as quickly as possible," Zients said in a task force briefing Friday. "We know reaching other populations will take time and focus."
In an attempt to better reach those hesitant to take the vaccine, the White House announced a "We Can Do This: Live" campaign to connect people on social media to trusted information by pairing health professionals with influencers, including actress Eva Longoria, TV personality Ryan Seacrest, Barbara Corcoran of Shark Tank and players of the NBA and the WNBA. 
Meanwhile, the Johnson & Johnson vaccine is available again after an 11-day pause due to reports of rare blood clots. States are counting on the easier-to-store, one-dose option to help protect hard-to-reach populations, including people who are experiencing homelessness, the homebound and incarcerated individuals. 
Although there are some problems with many vaccines, there is no other way to overcome this pandemic but to vaccinate.