What are the recommendations for travel during influenza season or a pandemic?

Dec 18, 2017 ... ... flu-related causes expire because the virus overwhelms the immune system; another third die from the immune response to secondary bacterial ... Four themes were identified as causes of vaccine hesitancy comprising: concerns over safety, lack of trust, lack of need for vaccination and cultural reasons. What causes influenza (flu)?. The flu is caused by the influenza virus. Common classes of the virus are type A and type B. Each type includes several ... Avian influenza (AI) is caused by influenza type A viruses that historically have spread between wild birds (waterfowl and shorebirds) with occasional ... What Causes Influenza? Influenza is caused by several different viruses that are in the influenza family. Each year, flu season is defined by a few ... The flu is primarily transmitted from person to person. If someone with the flu sneezes, coughs, or talks, droplets from them become airborne. If these droplets ... Influenza viruses cause the flu. There are four types of flu viruses: influenza A, B, C and D.6 The viruses tend to change in two ways: antigenic drift and ... What causes influenza? · Through the air, in droplets that an infected person spreads through a cough or sneeze · Through touching things that infected people ... Feb 12, 2025 ... Generally, influenza viruses can infect some wild species without causing signs of disease, but new strains can emerge that cause illness with ... Jan 4, 2023 ... Seasonal influenza (flu) season is here. There are four types of influenza viruses: A, B, C, and D. Influenza A and B viruses cause seasonal ...