The buzz is that everyone is at risk for contracting the mosquito-borne Zika virus. Why not? Since the successful effort to “democratize†HIV/AIDS in the 1980s as a threat to everyone, everywhere, every major disease outbreak has been presented as a worldwide threat. (Ebola’s gotten that treatment three times now.) But no. Despite admonitions from the public health agencies and headlines like the Washington Post’s “Why The United States Is So Vulnerable to the Alarming Spread of Zika Virus,†and despite President Obama’s request to Congress for $1.8 billion to fight the disease, Zika has little chance of spreading from...