About 31% thought the virus spreads through sneezes, and 42% didn't know about sexual transmission.
The genetically engineered mice have already yielded some pathogenesis clues.
The updates include guidance on postponing pregnancy, more finely tuned tips to prevent sexual spread, and a push for reliable contraception access in Puerto Rico.
Researchers say Zika might have been brought to the Americas from French Polynesia during a soccer tournament.
PAHO employs the Muppets, and Argentina, New Zealand report possible sexual spread.
In Zika virus developments today, Brazil's health ministry reported 273 more suspected microcephaly cases and the World Health Organization (WHO) released interim guidance on lab testing for Zika infection.
WHO head calls for a focus on building healthcare capacity, asks for more funds.
Experts said only 2 of the new methods—Wolbachia and transgenic mosquitoes—were at the stage for carefully designed pilot projects.
A gene study finds several changes in the circulating virus, though the clinical significance isn't clear.
The approach could be used to screen other dengue vaccine candidates, as well as for Zika vaccines.