<prompt> Half life of IgG is1-5 days2-8 days6 days20-23 days  <response>: Half-life of different immunoglobulins IgG - About 22 to 25 daysIgA - About 6 to 8 daysIgM - About 5 daysIgE - About 2 to 8 daysIgD - About 3 days 