Sending a shipment of vaccines to a Doctors Without Borders/Médecins Sans Frontières (MSF) project isn’t as easy as dropping a package in the mail. "I wish it were that easy,” says Mina Kanashiro, MSF supply quality control manager. “There’s a whole series of steps.” It starts with MSF warehouses receiving a request, checking available stocks and their expiration dates, then talking to the country where the shipment is going and making sure these vaccines will be approved for entry. Those that need to stay refrigerated add another level of complexity, but they are well worth the trouble. Vaccines are an essential part of lifesaving medical care for everyone, everywhere. During World Immunization Week, MSF is reminding people that vaccines can save lives—but only if they are made available and affordable.