How do pandemics spread internationally?

What impact do pandemics have on society?

What impact do they have on relations between groups of people?

In what ways must countries work together to stop the spread of pandemics?

When a virus infects a host cell, it uses the cell's machinery to make copies of its own genetic material in a process called replication. finally, during the process of self-assembly, that protein shell and the copies of the virus's genetic material are assembled into new viruses.