Sever's disease or calcaneal apophysitis is usually considered to be due to damage or a disturbance in this area of growth. The two growth areas of the calcaneus can be seen on this x-ray. The smaller area to the back of the heel is normal.hat are the long term consequences of heel pain in the child (Severs disease or Calcaneal apophysitis): This condition is self limiting-it will go away when the two parts of bony growth join together-this is natural.
So, a virus must have a host cell (bacteria, plant or animal) in which to live and make more viruses. Outside of a host cell, viruses cannot function. For this reason, viruses tread the fine line that separates living things from nonliving things.
Viruses lack some characteristics of living organisms. Outside of living cells, viruses are not alive. Outside of the living cells, viruses cannot move, grow, or reproduce. Viruses require living cells called host cells to be alive.Ultimately, viruses act as parasites and harm or destroy their host cells.iruses are structurally simpler than regular cells. Outside of the host cells, viruses are inactive. However, inside living cells, viruses show some of the characteristics of living things. Viruses are not made up of cells.