Acknowledgments
The authors would like to express sincere thanks to the staff of the Biological Services and the TB Research group, who provided access to and assistance in, the CL3 facilities used. Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Author Contributions
Conceptualization, K.-A.T., S.C. and A.B.; methodology, S.P., I.D., S.C. and K.-A.T.; data acquisition: S.P., I.D., A.S., I.G., S.C. and K.-A.T.; formal analysis, S.P. and K.-A.T.; resources, S.P., I.D., A.S., I.G., K.-A.T. and S.C.; writing—original draft preparation, S.P.; writing—review and editing, T.P., S.C. and A.B.; visualization, S.P.; supervision, K.-A.T., T.P. and A.B.; project administration; T.P.; funding acquisition, A.B. All authors have read and agreed to the published version of the manuscript.

Funding
This research was funded by the MRC award COV220-143 COVID-19: “Understanding environmental and airborne routes of transmission”.

Institutional Review Board Statement
Not applicable.

Informed Consent Statement
Not applicable.

Data Availability Statement
Original pfu and APS data available upon request.

Conflicts of Interest
The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.