Provides information on how up-to-date the maintained medRxiv snapshot provided by `mx_snapshot()` is by checking whether there have been any records added to, or updated in, the medRxiv repository since the last snapshot was taken.


See also

Other helper: mx_download(), mx_export()


# \donttest{ mx_crosscheck()
#> Using medRxiv snapshot - 2020-11-22 00:24
#> 23 new record(s) added/updated since last snapshot
# }