I've read just about everything I could but am still confused....

Traveled to Quito, Ecuador and Galapagos only last year from and to the US.

From what I have read YFV was/is not recommended for travel to those specific areas. We did not get YFV.

Next year looking to travel to South Africa. Will this be a problem on entry at JNB from US if we have Ecuador stamp from last year in our US passport. We will not be arriving from a YF areas do since we did not need YFV for Ecuador we not have certificate.

Thank you all for your patience and wisdom