The bishops said the church had been on the forefront of promoting an investigation into these vaccines.
In 2014, Africans suffered dozens of deadly terror attacks by groups either allied with Islamic State or using similarly bloody tactics.
A disagreement between the Catholic church and the government over a tetanus vaccine has clergy urging people to shun the injection, saying it's a stealth population-control ploy.
As climate change devastates communities in Kenya, church leaders are helping to address the crisis locally while also calling on industrialized nations to own up to their responsibilities for spewing greenhouse gas emissions into the atmosphere.
"I think [industrialized nations] are responsible for most of the emissions," said Peter Solomon Gichira, the climate change program officer at the All Africa Conference of Churches. "They have responsibility to support climate change adaptation and mitigation as a moral obligation."
Church leaders in West Africa are raising concerns over sporadic violence that has killed one of their own and frustrated efforts to stem the Ebola epidemic.
The violence took a dangerous turn last week in a remote village in southeast Guinea, when fearful villagers killed eight members of a disinfection and awareness team, including an evangelical church pastor.
A call for greater acceptance of gays and lesbians has put African and Western churches on a collision course.
Christian and Muslim leaders in Nigeria welcomed a controversial law that bans same-sex marriages and imposes a 14-year jail term for homosexual relations.
Church initiatives to promote peace among Kenya's Turkana and Pokot communities are vital to easing simmering conflicts over recently discovered oil deposits and continuing tensions over grazing lands and access to water, said the apostolic nuncio to the East Africa nation.
A bishop from eastern Congo said people in the area continue to suffer from an ongoing government-rebel conflict, and he hoped pressure from the international community would help relieve the situation.
Bishop Willy Ngumbi Ngengele of Kindu, Congo, told Catholic News Service in Nairobi that people in and around North Kivu and Goma were the worst hit.
"People there suffer from lack of food, shelter and clothes." he said. He said the church's aid agency, Caritas Internationalis, was helping victims, "and we thank God for this."
Amid increasing calls for legalization of abortion in Africa, botched cases among young women are on the rise, according to recent reports.
Governments are responding by distributing contraceptives, but the Roman Catholic church, some Muslim groups and anti-abortion groups are waging their own campaigns against contraception, warning it will further escalate the problem.