Table 3.

Research gaps identified.

(A) Lack of data for evaluation of NPIs effectiveness and (un)intended health consequences
(1) lack of reliable and separate data on PEH within Covid-19 notification systems	(2) lack of a comprehensive overview of NPIs and shelter strategies targeting PEH	(3) lack of understanding of infectious disease spread among PEH, e.g. in homeless shelters
(B) Targeted research into people experiencing rooflessness
While PEH may be deemed as a hard-to-reach population in general, it is essential to differentiate those living in shelters from those sleeping rough. People experiencing rooflessness may be at a less risk of SARS-Cov-2 infection as long as they do not seek congregate shelter but at the same time, they may be the ones experiencing more heavily the challenges of social distancing to mental and social wellbeing associated with the imposed lockdowns.
(C) Lack of qualitative research into living realities of PEH
More qualitative research is needed to better understand living realities and particular needs of PEH during the pandemic. This can further kick-start the participation of PEH in the research process.
(D) Timely updates of the review
With the current infection dynamics and speed of research, timely updates of synthesised information are essential.