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.
Vaccine should be given at 12 months of age to enhance the likelihood of an appropriate immune response. In a measles epidemic, vaccine should be given at an earlier age, such as at 6 to 9 months of age followed by the routinely recommended dose at 12 months of age (or 1 month after this initial dose).fter the potential risks and benefits are weighed, varicella vaccine should be considered for asymptomatic or mildly symptomatic HIV-infected children with CD4+ T-lymphocyte percentages of 25% or more.