By Bernard Orr and Humeyra Pamuk BEIJING/WASHINGTON (Reuters) – Cities across China scrambled to install hospital beds and build fever screening clinics on Tuesday as the United States said Beijing’s surprise decision to let the virus run free was a concern for the world. China this month abruptly began dismantling its stringent “zero-COVID” regime of mass lockdowns after protests against curbs that had largely kept the virus at bay for three years but at significant costs to society and the world’s second-largest economy. Now, as the virus sweeps through a country of 1.4 billion people who la…