How do pandemics work?
How do pandemics work?
user
Pandemics are generally defined as an epidemic disease that spread worldwide.  Many causes for pandemics are known, including animal diseases jumping to humans, antibiotic resistance, new vaccines, bacteria mutations, or natural disasters.
assistant
How do new vaccines cause pandemics?
user
Vaccines are developed to protect people from getting disease.  An example of a vaccination causing a pandemic is when the human papilloma virus (HPV) was spread from certain kinds of the vaccine to people who didn’t need it.
assistant
How does a natural disaster cause a pandemic?
user
Natural disasters can cause disruptions in access to clean water and sanitation, which can cause infectious diseases to spread.  For example, Ebola spread in West Africa after the natural disaster of the 2011 earthquake, which disrupted access to clean water and sanitation.  When people get sick with a new disease like Ebola, they have to go to the hospital.  During this time, they will spread the disease to others.  In addition, a natural disaster can have a major impact on food security.  In the aftermath of natural disasters, a significant number of people are too sick or too distracted to provide for their families, leaving people more likely to buy poor quality food.  If the food is contaminated with Ebola virus, this can also result in an epidemic of the disease.
assistant
What animal is most dangerous for spreading disease?
user