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## Topical or time-specific links: ##
+* [Robust T cell immunity in convalescent individuals with
+ asymptomatic or mild
+ COVID-19](https://www.biorxiv.org/content/10.1101/2020.06.29.174888v1)
+ (2020-06-29 preprint). Key finding: “Our collective dataset shows
+ that SARS-CoV-2 elicits robust memory T cell responses akin to those
+ observed in the context of successful vaccines, suggesting that
+ natural exposure or infection may prevent recurrent episodes of
+ severe COVID-19 also in seronegative individuals.”
+
+* [Intrafamilial Exposure to SARS-CoV-2 Induces Cellular Immune
+ Response without
+ Seroconversion](https://www.medrxiv.org/content/10.1101/2020.06.21.20132449v1)
+ (2020-06-20 preprint). Conclusion: “Exposure to SARS-CoV-2 can
+ induce virus-specific T cell responses without seroconversion. T
+ cell responses may be more sensitive indicators of SARS-Co-V-2
+ exposure than antibodies. Our results indicate that epidemiological
+ data relying only on the detection of SARS-CoV-2 antibodies may lead
+ to a substantial underestimation of prior exposure to the virus.”
+
+* [Systemic and mucosal antibody secretion specific to SARS-CoV-2
+ during mild versus severe
+ COVID-19](https://www.biorxiv.org/content/10.1101/2020.05.21.108308v1)
+ (2020-05-23 preprint). Main conclusion: “Data show that systemic
+ IgA and IgG production against SARS-CoV-2 develops mainly in severe
+ COVID-19, with very high IgA levels seen in patients with severe
+ ARDS, whereas mild disease may be associated with transient serum
+ titers of SARS-CoV-2-specific antibodies but stimulate mucosal
+ SARS-CoV-2-specific IgA secretion. The findings suggest four grades
+ of antibody responses dependent on COVID-19 severity.”
+
\[Note that around the end of May I stopped maintaining this list.
Still adding a few papers later, but it's definitely less complete
than it used to be.\]