This group includes diseases like pinta, yaws, endemic syphilis and venereal syphilis. Specifically it is used to treat strep throat, diphtheria, syphilis, and yaws. They concluded that trypanosomiasis, leprosy, yaws, and syphilis were responsible for most intravenous injections. The three subspecies causing yaws, bejel, and syphilis are morphologically and serologically indistinguishable. "Haemophilus ducreyi" infections can cause skin conditions that mimic primary yaws. There are also four ongoing programs, targeting poliomyelitis, yaws, dracunculiasis, and malaria. Yaws is not a venereal disease. Many of the workers and their families suffered from yaws, hookworm, and malaria. Yaws eradication remained a priority in south-east Asia. Yaws may be evolving less conspicuous lesions. Secondary yaws affects the skin and bones. Generally, yaws is not a notifiable disease. There are limited data available on the prevalence of yaws, although it primarily affects children. It also penetrates deeper and initially yaws faster. Nearby "daughter yaws" may also appear simultaneously.