* Many lack vaccine storage, training and equipment * Ghana alone faces almost $44 million funding gap * Conflict-weary Mali, South Sudan have a hard road By Edward McAllister DAKAR, April 21 (Reuters) - When Ghana received 50,000 COVID-19 vaccine doses from India last month, it hit a frustrating roadblock: it had not trained enough staff to distribute them. The country was still rolling out shots received in late February from the global vaccine-sharing scheme COVAX, and didn't have the capacity to expand that operation, according to the head of Ghana's immunisation programme. Rather than go...