Orthodoxy, illusio, and playing the scientific game: a Bourdieusian analysis of infection control science in the COVID-19 pandemic.

Background: Scientific and policy bodies' failure to acknowledge and act on the evidence base for airborne transmission of SARS-CoV-2 in a timely way is both a mystery and a scandal. In this study, we applied theories from Bourdieu to address the question, "How was a partial and partisan scientific account of SARS-CoV-2 transmission constructed and maintained, leading to widespread imposition of infection control policies which de-emphasised airborne transmission?".
Methods: From one international case study (the World Health Organisation) and three national ones (UK, Canada and Japan), we selected a purposive sample of publicly available texts including scientific evidence summaries, guidelines, policy documents, public announcements, and social media postings. To analyse these, we applied Bourdieusian concepts of field, doxa , scientific capital, illusio, and game-playing. We explored in particular the links between scientific capital, vested interests, and policy influence.
Results: Three fields-political, state (policy and regulatory), and scientific-were particularly relevant to our analysis. Political and policy actors at international, national, and regional level aligned-predominantly though not invariably-with medical scientific orthodoxy which promoted the droplet theory of transmission and considered aerosol transmission unproven or of doubtful relevance. This dominant scientific sub-field centred around the clinical discipline of infectious disease control, in which leading actors were hospital clinicians aligned with the evidence-based medicine movement. Aerosol scientists-typically, chemists, and engineers-representing the heterodoxy were systematically excluded from key decision-making networks and committees. Dominant discourses defined these scientists' ideas and methodologies as weak, their empirical findings as untrustworthy or insignificant, and their contributions to debate as unhelpful.
Conclusion: The hegemonic grip of medical infection control discourse remains strong. Exit from the pandemic depends on science and policy finding a way to renegotiate what Bourdieu called the 'rules of the scientific game'-what counts as evidence, quality, and rigour.
Competing Interests: Competing interests: All authors declare no competing financial interests. TG provided brief informal and unpaid advice to the UK Royal College of Nursing for the letter in source B3 and was invited to be a co-signatory on it.
(Copyright: © 2021 Greenhalgh T et al.)