Are south african citizens vaccinated against yellow fever

It depends on the wealth and amount of accessible health care in their area. South Africa is pretty large and depending on where they live, they may or may not receive vaccines. A majority of South Africans can receive vaccines, so most of them are vaccinated against Yellow Fever.

Have a nice day! :)

Dna strands are split apart to allow an opening for replication. the opening has two replication forks so synthesis goes toward them in 5' to 3' direction.