Clearly he has and isn't impressed. No respect given to any vaccine candidate that hasn't cleared rigorous testing... Induced hypersensitivity is a thing and was a big part of why there was never a SARS1 vaccine.

Quote:

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That lung disease exhibited the characteristics of a Th2-type immunopathology with eosinophils in the lung sections suggesting hypersensitivity that was reminiscent of the descriptions of the Th2-type immunopathologic reaction in young children given an inactivated RSV vaccine and subsequently infected with naturally-occurring RSV [32]–[33]. Most of these children experienced severe disease with infection that led to a high frequency of hospitalizations; two children died from the infection [33], [40], [41]. The conclusion from that experience was clear; RSV lung disease was enhanced by the prior vaccination. Subsequent studies in animal models that are thought to mimic the human experience indicate RSV inactivated vaccine induces an increased CD4+ T lymphocyte response, primarily of Th2 cells and the occurrence of immune complex depositions in lung tissues [32], [42], [43]. This type of tissue response is associated with an increase in type 2 cytokines including IL4, IL5, and IL13 and an influx of eosinophils into the infected lung; [32], [33], [42], [44]. Histologic sections of tissues exhibiting this type of response have a notable eosinophilic component in the cellular infiltrates. Recent studies indicate that the Th2-type immune response has both innate and adaptive immune response components [33], [43].

In addition to the RSV experience, concern for an inappropriate response among persons vaccinated with a SARS-CoV vaccine emanated from experiences with coronavirus infections and disease in animals that included enhanced disease among infected animals vaccinated earlier with a coronavirus vaccine

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https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3335060/