President Joe Biden’s goal of having seven out of 10 U.S. adults get at least one shot against the virus that causes COVID-19 by July 4 is in peril as demand for the jabs continue dropping. Daily vaccinations soared to 4.3 million on April 1 and remained above 4 million on other days in early April. But the daily number of shots has since dropped precipitously, hitting a low of 180,291 on May 31, according to federal data. About 828,000 people per day on average are getting their first or second shot, according to the latest seven-day average. Unless the number rises, 160 million U.S. adults will not be fully vaccinated by Independence Day. That was the other part of Biden’s goal. “It’s unlikely that we are going to hit the goal by July 4,” Susan Hassig, an epidemiology professor at Tulane University School of Public Health and Tropical Medicine, …