HIV infection passes through a series of steps or stages before it turns into AIDS. These specific stages of infection as outlined in 1993 by the Centers for Disease Control and prevention are: Flu like illness, persistent generalised lymphadenopathy (PGL), and symptomatic infections Seroconversion, asymptomatic infection, persistent generalised lymphadenopathy (PGL), and symptomatic infections Seroconversion, symptomatic infections, severe immunodeficiency Asymptomatic, opportunistic infections, destruction of the cell-mediated immune (CMI) system The recommendations for the prevention of meningococcal infection according to the Australian Immunisation Handbook is all individuals from six (6) weeks of age receive the MenACWY vaccine and the MenB vaccine only adolescents living in close quarters receive the MenACWY vaccine and the MenB vaccine only adolescents who are current smokers receive the MenACWY vaccine and the MenB vaccine only adults who are current smokers receive the MenACWY vaccine and the MenB vaccine Moving to another question will save this response. The country with the greatest number of confirmed human cases for avian influenza A (H5N1) as reported to the World Health Organisation (WHO) for the period of 2003 to 2018 is ? Great Britain Indonesia Egypt China .