Based B|A|S|T B|E + I|SH|T B|A|SH|T on U|N the D|AX number N|O|M|B|ER N|AH|M|B|I R N|O|M|B|I R of O|V AH|B O|B cases K|A|S|AX|Z K|E + I|SH|AX|Z K|A|SH|AX|Z K|E + I|S|AX|S K|A|S|AX|S K|E + I|SH|AX|S K|A|SH|AX|S identified IH|D|EH|N|T|AX|F|IH|D A + I|JH|EH|N|T|AX|F|A + I|JH IH|JH|EH|N|T|AX|F|IH|JH A + I|D|I|N|T|AX|F|A + I|D IH|D|I|N|T|AX|F|IH|D A + I|JH|I|N|T|AX|F|A + I|JH IH|JH|I|N|T|AX|F|IH|JH A + I|D|EH|N|T|AX|P|A + I|D IH|D|EH|N|T|AX|P|IH|D A + I|JH|EH|N|T|AX|P|A + I|JH IH|JH|EH|N|T|AX|P|IH|JH A + I|D|I|N|T|AX|P|A + I|D IH|D|I|N|T|AX|P|IH|D A + I|JH|I|N|T|AX|P|A + I|JH IH|JH|I|N|T|AX|P|IH|JH verify B|EH|R|AX|F|A + I V|I|R|AX|F|A + I B|I|R|AX|F|A + I V|EH|R|AX|P|A + I B|EH|R|AX|P|A + I V|I|R|AX|P|A + I B|I|R|AX|P|A + I V|EH|R|AX|F|IH B|EH|R|AX|F|IH V|I|R|AX|F|IH B|I|R|AX|F|IH V|EH|R|AX|P|IH B|EH|R|AX|P|IH V|I|R|AX|P|IH B|I|R|AX|P|IH the D|AX existence I|G|Z|I|S|T|AX|N|S EH|G|S|IH|S|T|AX|N|S I|G|S|I|S|T|AX|N|S EH|G|Z|IH|SH|T|AX|N|SH I|G|Z|I|SH|T|AX|N|SH EH|G|S|IH|SH|T|AX|N|SH I|G|S|I|SH|T|AX|N|SH of O|V AH|B O|B an A|N outbreak. A + UH|T|B|R|A|K Step SH|T|EH|P S|T|I|P SH|T|I|P three