What happened after black codes were eliminated first during reconstruction and then after

In April 1865, as the war drew to a close, Lincoln shocked many by proposing limited suffrage for African Americans in the South. He was assassinated days later, however, and his successor Andrew Johnson would be the one to preside over the beginning of Reconstruction.Black codes were restrictive laws designed to limit the freedom of African Americans and ensure their availability as a cheap labor force after slavery was abolished during the Civil War. 

Hope this helps:)

If i remember correctly it was caused by people hurling bodies at a country for some reason and them they all became infected