By Megan MontgomeryDays are long for Anna Mzeru.A nurse at a health dispensary in the Bagamoyo region of Tanzania, she is one of only two medical staff at a facility that should have nine to be fully staffed. She and the other provider see as many as 120 patients per day, and attend an average of 15 deliveries per month. “We sometimes leave very late, but we can’t leave the patients here. They need to be seen,” she says.The significant shortage of health workers at the clinic is common. Tanzania has a 56% vacancy rate across both public and private health care facilities.