Course and Cancellation Policies. Cancellation Policy. Registration is fully refundable only if course is canceled by The American Academy of Facial Esthetics. We reserve the right to cancel a course for any reason and cannot be responsible for hotel deposits or non-refundable airline tickets or other associated fees.
Type A Influenza: Introduction. Type A Influenza: Type A influenza is a subtype of the influenza virus that can cause cause serious illness and result in pandemics.Influenza is viral respiratory infection.ype A Influenza: Introduction. Type A Influenza: Type A influenza is a subtype of the influenza virus that can cause cause serious illness and result in pandemics.
I heard that only Influenza type A leads to pandemics situation since type B (or C) Influenza has only one HA and NA type. I donât understand why the types B and C have only one HA and NA type when the type A has a lot of different ones. And I donât understand the link between this and the capacity of producing pandemic. Thank you