Retrospective evidence that people in the United states who had “bad flu” in Oct-Nov 2019 and tested negative for influenza, but in early 2020 had positive IgG antibodies for SARS-CoV-2, indicating they had COVID-19 in late 2019, which doesn’t match the official timeline of the virus reaching the US in January 2020! [1, 2].

Known outbreaks of Influenza Like Illness (ILI) were “severe” and “widespread” across the United States in late 2019.

I lost count of the number of friends who, between November 2019 and early March 2020, told me they had never been so ill with flu, had the worst cough, took weeks to recover and felt weak for several weeks after that.”
An example testimony (Silverbirch)

Compilation of anecdotal evidence of a strange flu throughout USA in late 2019 early 2020.

“[R]esearch has identified at least 306 people from four other nations and at least seven U.S. states, many of whom also had Covid-like symptoms in the months of November and October 2019 with at least 153 of these early cases later receiving positive antibody tests.” [3]

On March 16, 2020 the US FDA warned that “results from antibody testing should not be used as the sole basis to diagnose or exclude SARS-CoV-2 infection or to inform infection status”.  It appeared PCR diagnostics were pushed over antibody surveillance. [4, 5]

By April 2020 the authorities were questioning the commercial antibody tests’ accuracy as they were showing 50-fold increase in cases compared to PCR tests, the findings also indicate that the virus is less deadly than current estimates of global case and death count!