"Essential Workers" in the Age of COVID-19 include--perhaps especially--nurses, doctors, and other medical workers. They are the ones willing to touch the diseased and disgusting things going on in our bodies to heal them.
Likewise, Jesus teaches, in this passage, that the heart is the source of all darkness and spiritual disease that we might deal with in life. Disciples follow Jesus in being willing to touch these places, to heal them. Disciples of Jesus are those whose hearts are cleansed by his blood. Now we can go into all the world bringing that healing to others.
Mark gives an account of Jesus sending the twelve disciples out on their first mission. They do everything just like Jesus did: they preached the gospel, cast out demons, healed diseases, and utterly relied upon God to provide everything for their work and journey. They enjoyed success this time, but Mark divides his account of this story with the story of John the Baptist's beheading by King Herod. We take from this the warning that discipleship on Jesus' path is to follow him on the way to the cross. But there is no more blessed way to be than to be just like Jesus.
Jesus compassionately heals a leper from his dread disease. On closer inspection, though, we learn that Jesus was angry for several important reasons. By his example, then, we gain some important insights about how to respond constructively when we get angry.
In the confusion of the recent riots in Charlottesville, VA, followers of Jesus must be truthful, loving, and open with the good news of Jesus the Savior and Lord.