Answer:
Vaccinations
Explanation:
For example, if a disease has an R0 of 18, a person who has the disease will transmit it to an average of 18 other people. That replication will continue if no one has been vaccinated against the disease or is already immune to it in their community. So if you have (for example) a vaccination then you're less likely to get it, resulting in a lower R0
It helps in digestion of food
It's chemoautotrophs because cyanobacteria can be mixotrophic if needed and they are classified as algae.
25% if i am remembering correctly BUT DONT GO BY WHAT I SAID
