Because this deadly virus dispersed through the easy-droplet-airborne method, special safety measures to prevent a massive epidemic had to be instituted, as well.
The virus is deadly and they had to take measures to protect people. 
mnli hypothesis: The virus is deadly and they had to take measures to protect people.  premise: Because this deadly virus dispersed through the easy-droplet-airborne method, special safety measures to prevent a massive epidemic had to be instituted, as well.