Clinical presentation of congenital syphilis in a rotavirus vaccine cohort study in Lusaka: a case series oleh Nsofwa Sukwa, Michelo Simuyandi, Masuzyo Chirwa, Yvonne Mutombo Kumwimba, Obvious N. Chilyabanyama, Natasha Laban, Aybüke Koyuncu, Roma Chilengi