As more coronavirus restrictions are relaxed across the country and President Donald Trump flouts social distancing measures with indoor public campaign rallies, roughly half of U.S. states are seeing an increase in cases. “We should continue to be worried,” said Sandro Galea, the dean of Boston University’s School of Public Health. Galea told Jim Braude on WGBH News’ Greater Boston Monday that while Massachusetts is “on the other side of the epidemic curve now,” many other states are still in the early stages of their outbreaks.