article_snippet: emerge as a pandemic strain in humans, scientists have warned.
article_snippet: This has fulled a resurgence of infections in people, posing a wider threat.
article_snippet: After an initial flare up of human cases at the start of .
article_snippet: But infections in people increased again last year and in .
article_snippet: might threaten public health.
article_snippet: for human health - does any of this change the pandemic .
article_snippet: transportation during disease outbreaks are needed to reduce the . threat of H7N9 to public health,' transportation during disease outbreaks wrote.
highlights_snippet: This has fulled a resurgence of infections in people, posing a wider threat .
  