Keeping your hands clean is one of the most important steps you can take to avoid getting sick and spreading germs to the people around you. Many diseases and conditions are spread by not cleaning your hands properly (http://www.cdc.gov/handwashing/when-how-handwashing.html). Here are five important things you might not know about washing your hands and why it matters.

The Centers for Disease Control and Prevention (CDC) is advising hospitals to notify patients who underwent open-heart (open-chest) surgery involving a Stöckert 3T heater-cooler that the device was potentially contaminated, possibly putting patients at risk for a life threatening infection. New information indicates that these devices, manufactured by LivaNova PLC (formerly Sorin Group Deutschland GmbH), were likely contaminated with the rare bacteria Mycobacterium chimaera during manufacturing. Hospitals should advise potentially exposed patients to seek medical care if they are experiencing symptoms such as night sweats, muscle aches, unexplained weight loss, fatigue, or unexplained fever. In addition, hospitals that use or have used this device are strongly encouraged to make and execute a plan to communicate with potentially exposed patients and to increase awareness among healthcare providers.

The Centers for Disease Control and Prevention (CDC) is advising hospitals to notify patients who underwent open-heart (open-chest) surgery involving a Stöckert 3T heater-cooler that the device was potentially contaminated, possibly putting patients at risk for a life threatening infection. New information indicates that these devices, manufactured by LivaNova PLC (formerly Sorin Group Deutschland GmbH), were likely contaminated with the rare bacteria Mycobacterium chimaera during manufacturing. Hospitals should advise potentially exposed patients to seek medical care if they are experiencing symptoms such as night sweats, muscle aches, unexplained weight loss, fatigue, or unexplained fever. In addition, hospitals that use or have used this device are strongly encouraged to make and execute a plan to communicate with potentially exposed patients and to increase awareness among healthcare providers.

The minutes, hours, and days immediately following a disaster are the most critical for saving lives. In times of crisis, local communities are first to respond. It’s up to each of us to make sure our communities are resilient and can bounce back from disaster. We do this by being prepared to help ourselves and those around us.

Category 4 Hurricane Matthew struck the south-west coast of Haiti at 0700 local time (1200 GMT) on 4 October. Wind speeds of 230km/h were recorded, causing widespread damage, flooding and displacement. The most affected departments are Grand Anse, South, Nippes and South East, where heavy floods were recorded. West and North West departments were also affected. The government of Haiti has issued a Red Alert and the Haiti National Emergency Operation Center has been activated. Estimates are that over 2 million people could be affected.

As fall approaches, cold weather isn’t the only thing you and your family need to prepare for. Flu season is on its way, and it will be here before you know it. Now is the time to make sure that you and your family are protected from flu by getting your flu vaccine by the end of October, if possible.

A rare winter storm in 2008 buried Portland, Oregon under more than a foot of snow, leaving the city gridlocked (https://www.portlandoregon.gov/transportation/article/376317). Like many others around the city, Nickole Cheron was stuck in her home for eight days. But for Nickole—who was born with spinal muscular atrophy, a genetic disease that weakens the body’s muscles over time—the storm was potentially life-threatening.

Emergencies are everywhere: from floods to flu, tornadoes to terrorists… How do you prepare for all of it? Trying to prepare for every possibility can seem impossible. But you can be smart about preparing for the emergencies and situations you are most likely to experience. Start by looking around at where you live, the people in your life, and the places you go on a day-to-day basis. Ask yourself questions, then figure out what steps you can take.

It all started when Fred jumped into the bathtub. It was one of those warm, Kansas summer days, back in 2013. Fred the German Shepherd had just joined our family, and my wife eagerly captured all his adorable dog-moments with her camera. So when Fred hopped into the tub, she quickly snapped a photo and sent it to me. Having worked in emergency preparedness for ten years, I saw something more in that picture: Fred was doing a good job of being prepared.

CDC previously issued travel, testing, and other guidance related to local mosquito-borne Zika virus transmission (active Zika virus transmission) that the Florida Department of Health (FL DOH) identified in two areas of Miami-Dade County: (1) a one-square-mile area in Wynwood, and (2) a 1.5-square-mile area in Miami Beach. CDC has updated the guidance for people who live in or traveled to these areas.

CDC previously issued travel, testing, and other guidance related to local mosquito-borne Zika virus transmission (active Zika virus transmission) that the Florida Department of Health (FL DOH) identified in two areas of Miami-Dade County: (1) a one-square-mile area in Wynwood, and (2) a 1.5-square-mile area in Miami Beach. CDC has updated the guidance for people who live in or traveled to these areas.

No one told the Aedes mosquito that New York is the city that never sleeps. The type of mosquito that can spread Zika virus (Zika) is most active during the day and hides at night when our city’s mosquito control efforts are in full swing, meaning that our scientists had to find a way to reach it during pre-dawn hours. The solution? Wake it up, force it to take flight, and then kill it. This is just one of many innovations New York is using to bolster the fight against Zika.

When Dr. Aristide Abah stepped off the plane that brought him from Atlanta back to his home in Cameroon, there was no time to waste. An outbreak of H5N1 flu (http://www.cdc.gov/flu/avianflu/h5n1-people.htm) threatened the country, and it was up to Dr. Abah to lead the response. Fortunately, he was prepared.

By Dr. Stephen Redd: If there were one thing I’d wish for, it would be the ability to predict when and where the next infectious disease outbreak would occur and stop it before it starts. I can’t do that. And neither can anyone else. At this moment, in addition to combating Zika in the United States and polio in Nigeria and Pakistan, we’re putting out the last embers of Ebola in West Africa, stomping out cholera in Tanzania and Kenya, and fighting yellow fever in Angola. We’re keeping vigilant for the re-emergence of H5N1 influenza and Middle East respiratory syndrome, and monitoring chikungunya, dengue, monkeypox, Lassa fever, measles…the list goes on.

By Dr. Stephen Redd: There’s a big difference between seeing something in a picture and experiencing it in 360-degree reality, saturated with sounds and smells. In the summer of 1987, I traveled to Senegal for three weeks. This was the first time I had really traveled and seen firsthand what the rest of the world was like.

On October 26, 2015, CDC issued HAN 384 (http://emergency.cdc.gov/han/han00384.asp) that alerted (1) public health departments, health care professionals, first responders, and medical examiners and coroners of the increase in fentanyl-related unintentional overdose fatalities in multiple states primarily driven by illicitly manufactured fentanyl (IMF) (i.e., non-pharmaceutical fentanyl); (2) provided recommendations for improving detection of fentanyl-related overdose outbreaks; and (3) encouraged states to expand access to naloxone and training for administering naloxone to reduce opioid overdose deaths.

On October 26, 2015, CDC issued HAN 384 (http://emergency.cdc.gov/han/han00384.asp) that alerted (1) public health departments, health care professionals, first responders, and medical examiners and coroners of the increase in fentanyl-related unintentional overdose fatalities in multiple states primarily driven by illicitly manufactured fentanyl (IMF) (i.e., non-pharmaceutical fentanyl); (2) provided recommendations for improving detection of fentanyl-related overdose outbreaks; and (3) encouraged states to expand access to naloxone and training for administering naloxone to reduce opioid overdose deaths.

CDC has previously issued travel, testing, and other guidance for local mosquito-borne Zika virus transmission (active Zika virus transmission) for a one-square-mile area in the Wynwood area of Miami that the Florida Department of Health (FL DOH) identified. The guidance for those who live in or traveled to this area any time after June 15, 2016, remains in effect. FL DOH continues to investigate active Zika virus transmission in South Florida. Investigation has revealed a new area of active transmission in a 1.5-square-mile section of Miami Beach. In addition, FL DOH has identified multiple other individual instances of mosquito-borne Zika virus infection and an increase in travel-related cases.

CDC has previously issued travel, testing, and other guidance for local mosquito-borne Zika virus transmission (active Zika virus transmission) for a one-square-mile area in the Wynwood area of Miami that the Florida Department of Health (FL DOH) identified. The guidance for those who live in or traveled to this area any time after June 15, 2016, remains in effect. FL DOH continues to investigate active Zika virus transmission in South Florida. Investigation has revealed a new area of active transmission in a 1.5-square-mile section of Miami Beach. In addition, FL DOH has identified multiple other individual instances of mosquito-borne Zika virus infection and an increase in travel-related cases.

The scale of the Syrian crisis is nearly beyond comprehension: 4.8 million refugees, 8.7 million people displaced inside Syria’s borders. But the numbers don’t tell the whole story. Across the world, CDC has people on the ground working to protect the health of those affected by the crisis – people like Leisel Talley, whose mission is to help mothers and babies get the nutrition they need, despite unimaginable circumstances.