As part of the US National Science Foundation (Award #2029673) RAPID project Corona Virus – Exploring Causes and Cures through Literature Based Discovery, the VantagePoint Dashboard Site has been supporting the use of bibliometric and text analytic methods applied to a PubMed search query to help researchers understand what researchers are working on COVID-19, who are they working with and where is the research being conducted. Noting some interesting trends as of late...tracking Month of Publication, the data had been leveling off from early exponential growth early in the pandemic, but has been trending strongly upward beginning in June 2021, hitting the highest monthly numbers in July of this year with nearly 9,000 unique publications.
For the categorization… The most noticeable change is with Vaccination. It has risen significantly beginning in May 2021 through July (the last month with a full month worth of data). Mental Health also appear to be mentioned more frequently beginning in late 2020.