As the immune system continues its catastrophic collapse, the victim becomes vulnerable to a host of infections ​ — pneumonia, meningitis, tuberculosis, or certain cancers — ​ called opportunistic because they make use of the opportunity created by a victim’s lowered resistance.
लेकिन समय आने पर फ़्लू समान लक्षण विकसित होते हैं — वज़न और भूख कम होना, बुख़ार, और दस्त ।