The frequency and virulence of bacterial and viral infections has been ramping up over the past decade.
Since Sickness and Disease originated from Sin it is likely that the proliferation of Sin has increased the occurrence and severity of Sickness and Disease.
Sickness is disorder in the Physical, Mental or Emotional part of a person - their Soul.
God is the God of Order. He is perfect. Sickness is anathema to Him.
He sent Christ Jesus into the world to Suffer for the eradication of Sickness that came into Humanity as a result of Sin.
Who his own self bare our sins in his own body on the tree, that we, being dead to sins, should live unto righteousness: by whose stripes you were healed. -
Christ Jesus has Healed us of all or Sickness and Disease.
Healing is appropriated in the same way that Salvation is - by Faith in the finished work of Christ Jesus. Believe and Receive!