A health department microbiologist looks for mosquitoes carrying Zika virus in Hutchins, Texas. LM Otero/AP hide caption

Alison Kodjak
Heather Bresch, CEO of Mylan Pharmacueticals, will face lawmakers' questions Wednesday about the company's steep price hikes for the company's life-saving EpiPen auto-injector. Dale Sparks/AP hide caption
The FDA says there's no evidence that antibacterial soaps do a better job cleaning hands, and chemicals in them may pose health hazards. The FDA ban applies only to consumer products, not those used in hospitals and food service settings. Mike Kemp/Blend Images/Getty Images hide caption
County mosquito control inspector Yasser "Jazz" Compagines sprays a storm drain in Miami Beach to thwart mosquitoes that spread Zika. Alan Diaz/AP hide caption
POLL: Most Americans Want Congress To Make Zika Funding A High Priority
Mylan, the maker of EpiPen, says it will sell a generic version for $300 for a two-pack, a price that consumer advocates say is still too high. The device is used to treat severe allergic reactions. Daniel Acker/Bloomberg via Getty Images hide caption
The cost of an EpiPen two-pack has risen more than 400 percent in recent years. The drug is used to halt severe allergic reactions. Joe Raedle/Getty Images hide caption
An aggressive marketing campaign has made the EpiPen the go-to drug for treating anaphylaxis. Mark Zaleski/AP hide caption
Aetna is the latest big health insurer to retreat from the exchanges established under the Affordable Care Act. Jessica Hill/AP hide caption
Express Scripts assures patients it has a policy of not putting cancer medicine or mental health drugs on the list of products it excludes from its formulary. Fuse/Getty Images hide caption
In 2015, the Sandoz unit of drugmaker Novartis won Food and Drug Administration approval of a drug called Zarxio, which is similar to Amgen's Neupogen, a medicine that boosts the production of white blood cells. Sebastien Bozon/AFP/Getty Images hide caption