The unique nature about the influenza virus is its great potential for changes, for mutation.

HIV AIDS is a disease with stigma. And we have learned with experience, not just with HIV AIDS but with other diseases, countries for many reasons are sometimes hesitant to admit they have a problem.

Mexico is a safe, as well as a beautiful and warmly gracious, place to visit.

All countries should immediately now activate their pandemic preparedness plans. Countries should remain on high alert for unusual outbreaks of influenza-like illness and severe pneumonia.

When WHO works with the private sector, the Organization takes all possible measures to ensure its work to develop policy and guidelines is protected from industry influence.

The possible impact of the virus [Zika] an extraordinary event and a public health threat to other parts of the world.

Everyone needs to remember that Ebola was not a worst-case scenario. Preparedness for the future means preparedness for a very severe disease that spreads via the airborne route or can be transmitted during the incubation period, before an infected person shows telltale signs of illness.