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                <p>The experts acknowledge that projections are hampered by a limited knowledge about the disease. It takes 10 to 11 days for a mosquito to become fully infected and able to pass on the virus, according to Nikos Vasilakis, an arbovirologist at University of Texas Medical Branch in Galveston, where researchers are working in collaboration with scientists at Yale’s School of Public Health in Brazil. They don’t yet know what the risk is for pregnant women who are bitten by an i