NEW: Central US Winter Storms February 2021 UPDATED: Arctic Amplification UPDATED: Winter Storm Risk Increase Event Reports: Biweekly Regional Zika Epidemiological Updates (Americas) by Pan American Health Organization / World Health Organization Click the link below to see the latest, biweekly Pan American Health Organization/ World Health Organization (PAHO/WHO) Zika Epidemiological Update: Go to Site Related Events Zika Outbreak 2014 - Related Climate Signals Vector-Borne Disease Risk Increase