Must extend side-effects monitoring to 28 days after vaccination: Top official SECTIONS Share Synopsis Dr NK Arora, member of the national AEFI Adverse Events Following Immunization (AEFI) committee, said with more vaccines set to enter the market, monitoring for side-effects should be enhanced. TNN (This story originally appeared in on May 16, 2021)All states should monitor vaccine recipients for Adverse Events Following Immunisation (AEFI) for 28 days, a top public health official has said. Currently, recipients are monitored for AEFI for the first 72 hours after receiving a jab. Dr NK Arora, member of the national AEFI Adverse Events Following Immunization (AEFI) committee, said with more vaccines set to enter the market, monitoring for side-effects should be enhanced.