Explanation: Two viruses are corona and flu. Two bacterias are Bacilli Bacteria, and Cocci Bacteria
Explanation for corona is a very sicken virus and can sometimes kill people, like the flu.
Explanation for Bacilli bacteria is coli bacteria are a normal part of the intestinal flora in humans and other animals and a explanation for cocci bacteria is, This antibiotic resistant strain of Staphylococcus aureus bacteria (yellow), commonly known as MRSA
Hope this helps, it might be wrong but I think it is right! <3