The massive mammals are being tranquilized and transported from Malawi’s Liwonde National Park to the much larger Kasungu park.
Gum disease has been linked to premature birth, leading some scientists to believe bacterial infections in the mouth can increase inflammation in the body.
The pilot program hopes to vaccinate at least 360,000 children a year in three countries, potentially saving thousands of lives.
Mozambique, Zimbabwe and Malawi are still in need of aid after Cyclone Idai.
Many more are missing in Mozambique, Zimbabwe and Malawi in the region's most destructive flooding in 20 years.
"Tree of life," the pop superstar captioned the picture.