is there any vaccine for malaria/?if not why /?

Question: is there any vaccine for malaria/?if not why /?
- Keywords:
  malaria,
  vaccine
Asked by 954bmay29 to Peter, Jonathan, Grace, Doris, David, Ann on 2 Jun 2019.
- Grace Kago answered on 2 Jun 2019:
  
  I think that there was a vaccine for malaria that is in trial?
  https://www.who.int/news-room/detail/23-04-2019-malaria-vaccine-pilot-launched-in-malawi
- Peter Macharia answered on 3 Jun 2019:
  
  Yes, the Vaccine is called RTSS, the trials are happening in Malawi, Ghana and Kenya. KEMRI is part of the trial. In Kenya, it’s happening on the Western side of the country. It can prevent approximately 4 in 10 malaria cases

Question: is there any vaccine for malaria/?if not why /?