My children have got MEASLES?

My Name is (…), i am Health worker and i am in Somaliland East Africa,
My question is ;
4 of my children have got MEASLES three of them are in the first four days and they are 8years, 4years, and 2years while the other one is becoming recovering , these children are rejecting oral feeding they are coughing and vomating and high fever the rashes does not apear on their body except the mouth, so far please send me your advice. Thanks.