BELGRADE, Serbia (AP) — Serbia is mulling how to curb accelerating coronavirus infections following two nights of chaotic anti-lockdown demonstrations, while the virus shows no sign of slowing in the three countries with the highest caseloads. Tallies from Johns Hopkins University show the United States, India and Brazil are accounting for more than 60% of new confirmed cases. Much of Europe appears to have put the worst of the crisis behind it, at least for now. But Serbia has emerged as a new focus of concern — and of unrest. Flare-ups in infections are causing concern in several places of the world where authorities warned that restrictions on public activities would be reintroduced if residents didn’t adhere to safety precautions.