Figure 7.

Trends over Time

(A) The distribution over time of COVID-19 abstracts with different projection values on the second PC (i.e., those likely reflecting CMF research versus laboratory research) and the different timelines for publication between these groups.

(B) COVID-19 research is predominantly focused on outbreak reporting and public health issues. For both graphics, the y and x axes represent the count of abstracts and the date of each count, respectively. Each line in both graphics is colored by the different groups of abstracts; for (A), each group is comprised of abstracts within a certain range of projection values on PC2, and for (B), each group is comprised of abstracts within a certain topic family.