Asked an AI if there is another virus that reinfects people as quickly or often as #COVID19:

No virus reinfects as quickly and frequently as SARS-CoV-2 with the same combination of high transmissibility, immune evasion, and global impact.

SARS-CoV-2’s unique combination of rapid mutation (e.g., Omicron variants), high transmissibility (R0 often 5–10+ for variants), and ability to evade both natural and vaccine-induced immunity makes it stand out. .