SocIndex (indexes articles published in sociology journals). Example:
Criminal Justice Abstracts (indexes articles published in criminal justice journals)
Project Muse ( Indexes philosophy journals)
LexisNexis for law review articles.
SCOPUS Especially good for biomedical topics, this is also a good search tool for finding articles from sociology and humanities journals.
Good words and phrases to combine in a search for issues regarding the ethics of quarantines, and other non-clinical questions raised by contagious disease outbreaks:
quarantine* AND "ethical aspects"
the asterisk * truncates, so that quarantine* will retrieve the words quarantine and quarantines
epidemics AND economic* retrieves the words economic and economics
"public health" AND "civil liberties"
"police power" AND "public health"
"public good" AND vaccination
(disease* or health) and "human rights"
(epidemics OR "contagious diseases") AND ethics
"public health" AND ( "human rights" OR civil rights OR "civil liberties")