PIERRE, S.D.(WNAX)- Health care professionals continue to push people to get vaccinated against Covid-19 as infection numbers start to rise again due to the Delta variant.

Avera Health Chief Medical Officer, Dr Kevin Post, says herd immunity is still a ways off.

Post says they are watching for signs of re-emerging infections.

Post says if there is another surge of infections, they learned a lot from the first wave.

Delta variant infections are rising fastest in states with the lowest vaccination rates.