The phagocytic cells of the immune system include macrophages, neutrophils, and dendritic cells. Phagocytosis of the hostsâ own cells is common as part of regular tissue development and maintenance.hese are immune cells that engulf, i.e. phagocytose, pathogens or particles. To engulf a particle or pathogen, a phagocyte extends portions of its plasma membrane, wrapping the membrane around the particle until it is enveloped (i.e. the particle is now inside the cell).
ACIP recommends that all children receive 2 doses of varicella vaccine routinely. The first dose should be given at age 12 through 15 months and the second dose at age 4 through 6 years.
Local providers are reluctant to give zoster vaccine to persons age 80-plus years. There is no upper age limit for zoster vaccine. The incidence of herpes zoster increases with increasing age; about 50% of persons living until age 85 years will develop zoster. ACIP recommends the vaccine for everyone age 60 and older, even though the vaccine's efficacy decreases with an increase in the recipient's age.