Daily Archives: August 18, 2017






'Herd immunity' may be curbing US Zika numbers – Chicago Tribune08/17/2017Chicago Tribune'Herd immunity' may be curbing US Zika numbersChicago TribuneThe number of Zika infections has dropped dramatically in Florida this summer, and scientists say herd immunity may be the reason why. In practical terms, herd immunity means that people traveling […]

'Herd immunity' may be curbing US Zika numbers – Chicago ...