The United Kingdom Security Agency produced a rapid summary of the evidence on the human incubation and infectious period for influenza A(H5). There were 11 studies included between 2003 and 2014 from Asia which limited the generalizability of the findings. Despite this limitation, the estimated range of the infectious period was between 5 and 13 days (1), and 2 and 11 days (2); and the estimated incubation period was between 2 and 10 days.

1. Yang Y and others. 'Detecting human-to-human transmission of avian influenza A (H5N1)' Emerging Infectious Diseases 2007: volume 13(9).
2. Aditama TY and others. 'Avian influenza H5N1 transmission in households, Indonesia' PloS One 2012: volume 7(1):  e29971.