A new strain of virus, previously unseen in humans, has been identified. The World Health Organization reports that a man with underlying health conditions succumbed to the virus shortly after hospitalization. The source of infection remains unclear as he had no known contact with animals. Officials state the infection risk to Mexico's population is low. This strain differs from another that has affected dairy workers in the US.

What did officials say about the infection risk to Mexico's population?

How does the strain mentioned differ from the one that infected dairy workers in the US?