How does the circulation of misinformation create a massive public health issue? What are some of the ways to combat and/or mitigate this particular scenario?

Health Crisis Management
Consider some of the recent fake news related to the efficacy and purpose of vaccines. How does the circulation of misinformation create a massive public health issue? What are some of the ways to combat and/or mitigate this particular scenario?
– Word count requirement is between 200 and 500 words
– Handwritten answers will be rejected