1 Subjects: “...contact inhibition...”

2 Subjects: “...vitamin B12...”

3 Subjects: “...lactone-rhodamine B...”

4 Subjects: “...contact tracing...”

5 Subjects: “...contact vector field...”

6 Subjects: “...B.1.1.7...”

7 Subjects: “...B.1.1.7...”

8 Subjects: “...contact metamorphism...”

9 Table of Contents: “... -- Appendix A : Author contact details -- Appendix B : Evolution of the hypotheses -- Appendix C : Interview...”

10 “...The current Special Issue is a synthetic overview of 21 published articles. The contact point...”