David Baltimore

In the debate over the origin of SARS-CoV-2, Baltimore described the furin cleavage site as a “smoking gun” which, in his view, challenged the hypothesis of natural origin. The remark was widely repeated as support for the laboratory manipulation hypothesis. He subsequently said that he regretted the wording and clarified that it did not prove the virus's origin and that a natural origin remained possible.

State of the evidence

Documented

Attribution

Personally implicated

An appeals panel of the Department of Health and Human Services rejected the findings of scientific misconduct against Imanishi-Kari, concluding that the ORI had not produced the necessary evidence. The outcome was widely described as vindicating Baltimore, who had defended her and had never himself been accused of fraud.

State of the evidence

Documented

Role of the person profiled

Protagonist not prosecuted

After federal prosecutors decided not to prosecute Imanishi-Kari, Baltimore withdrew the retraction he had requested the previous year, considering that the case had changed and that evidence of fraud had not been established.

State of the evidence

Documented

In March 1991, after reviewing a draft report by the Office of Scientific Integrity identifying serious problems in Imanishi-Kari's work, Baltimore asked Cell to retract the 1986 paper and acknowledged that he had defended it for too long.

State of the evidence

Documented

After a year of growing pressure relating to the Imanishi-Kari affair and criticism of his attitude, Baltimore announced his resignation as president of Rockefeller University while remaining a scientist at the institution.

State of the evidence

Well documented

A 1986 paper co-authored by Baltimore and Thereza Imanishi-Kari was challenged by postdoctoral researcher Margot O'Toole, who alleged that certain data were inconsistent. Baltimore defended his co-author and the work, then testified at a 1989 congressional hearing devoted to the case and scientific integrity.

State of the evidence

Documented

Role of the person profiled

Protagonist not prosecuted

Baltimore played a central role in creating the Whitehead Institute for Biomedical Research, a financially independent organisation closely affiliated with MIT's biology department. The arrangement prompted significant controversy at the time over academic autonomy, control by a private donor and potential conflicts between MIT and institute responsibilities.

State of the evidence

Documented

Baltimore was among the scientists who called for a temporary suspension of certain recombinant DNA experiments and helped organise the 1975 Asilomar conference to define containment and self-regulation measures. The initiative prompted intense debate about biological risks and the legitimacy of scientists setting their own rules.

State of the evidence

Well documented