*3.1. Growth and Journals of the Relevant Publications*

Based on our search strategy and on the inclusion and exclusion criteria, 1443 journal articles were retrieved in PubMed on the topic of climate change and infectious diseases from 1999 to 2018. The annual number of related articles grew exponentially from only 18 in 1999, to the maximum, 147 in 2017, as shown in Figure 1, where an exponential trend line could be added (the degree of fitting, R2, is 0.83). For the two periods, 1999–2008 and 2009–2018, there were 368 and 1075 journal articles involved, respectively, which were then subjected to a comparative analysis.

**Figure 1.** Temporal distribution of research output about climate change and infectious diseases (PubMed sourced).

Altogether, 521 journals were involved in the field (1999–2008: 226 journals; 2009–2018: 407 journals). The United States and England were always two major publication places of journals publishing relevant articles in the two decades, as illustrated in Figure 2. The third publication places were France in the first decade and the Netherlands in the second decade. Table 1 displays the top ten productive journals for each period, as well as their languages, publication places, and number of publications. In 1999–2008, the top three most active journals were *Emerging Infectious Diseases*, *Journal of Travel Medicine*, and *Annals of the New York Academy of Science*, whereas in the latter ten years, *PLoS One*, *International Journal of Environmental Research and Public Health*, and *Epidemiology and Infection* were the most popular.



**Figure 2.** Publication places of journals publishing articles on climate change and infectious diseases. (**a**) Publication places of journals publishing relevant articles from 1999 to 2008; (**b**) publication places of journals publishing relevant articles from 2009 to 2018.
