[1] Between 1912 and 1913 during the Balkan Wars, Lozanić worked in "Saint Helena" orphanage and completed a nursing course to assist with tending the wounded at a convalescent center in Vračar.

Working at a hospital there, in November 1914, the Serbian Red Cross appointed her as a representative to secure humanitarian aid from the United States.

She also worked with the Committee for the Relief of Serbia, located in California and northern France to secure dairy cattle and grain for Serbian farmers.

[1] She returned to the United States and met John Whipple Frothingham, an American Red Cross worker who had been sent to Serbia Between 1917 and 1919.

[11] By the end of 1920, Losanitch and Frothingham were engaged[2] and the couple married on 3 January 1921 in a double ceremony held at the St. Nicholas Russian Orthodox Cathedral in Manhattan and the Church of the Saviour in Brooklyn.

During the Spanish Civil War, the couple used their home in Guéthary as an orphanage and center to help reunite separated children with their families.