Why Do Bats Carry So Many Dangerous Diseases?

Bats are amazing and not just because they're the only mammal that can fly! But they also carry a lot of diseases that are dangerous to humans, and while that is definitely not their fault, there is actually a lot we can learn from their unique immune systems.
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Sources:
http://www.plosone.org/doi/pone.0001676
https://doi.org/10.1093/icb/icw115
https://www.ncbi.nlm.nih.gov/pubmed/9542147
https://doi.org/10.1073/pnas.0912613107
https://doi.org/10.1126/science.1230835
https://doi.org/10.1007/978-3-319-48427-3_1
https://doi.org/10.1155/2012/936486
https://doi.org/10.1007/978-3-540-29807-6_136
https://doi.org/10.1016/B978-0-12-805417-8.00005-6
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4565025/
https://smw.ch/article/doi/smw.2012.13659
https://www.ncbi.nlm.nih.gov/pubmed/27043143
https://doi.org/10.1155/2016/3164734
https://doi.org/10.1016/j.cotox.2017.11.001
https://www.ncbi.nlm.nih.gov/pubmed/24031067
https://www.ncbi.nlm.nih.gov/pubmed/16722332
https://www.ncbi.nlm.nih.gov/pubmed/22296764
https://www.ncbi.nlm.nih.gov/pubmed/28791024
https://www.ncbi.nlm.nih.gov/pubmed/29467962
https://www.ncbi.nlm.nih.gov/pubmed/17408451
https://www.ncbi.nlm.nih.gov/pubmed/25533784
https://www.ncbi.nlm.nih.gov/pubmed/28466096
https://doi.org/10.1038/s41564-019-0371-3
https://doi.org/10.3389/fimmu.2020.00026
https://www.ncbi.nlm.nih.gov/pubmed/26101270
https://www.ncbi.nlm.nih.gov/pubmed/10024977
https://www.ncbi.nlm.nih.gov/pubmed/22046196
https://www.sciencedaily.com/releases/2019/01/190124095156.htm
https://www.ncbi.nlm.nih.gov/pubmed/16357858
https://doi.org/10.1038/s41586-020-2012-7
https://doi.org/10.1038/s41586-020-2008-3
https://www.ncbi.nlm.nih.gov/pubmed/26330152
https://www.ncbi.nlm.nih.gov/pubmed/11256746
https://www.ncbi.nlm.nih.gov/pubmed/26903655
https://doi.org/10.3389/fimmu.2018.02112
https://www.ncbi.nlm.nih.gov/pubmed/28959255
https://www.ncbi.nlm.nih.gov/pubmed/17400356
https://doi.org/10.1371/journal.ppat.1006989
https://www.ncbi.nlm.nih.gov/pubmed/26858407
https://www.ncbi.nlm.nih.gov/pubmed/26231767
https://www.ncbi.nlm.nih.gov/pubmed/29180486
https://doi.org/10.1016/j.cyto.2018.12.008
https://europepmc.org/article/med/15602737
https://www.ncbi.nlm.nih.gov/pubmed/31018522
https://www.pnas.org/content/111/10/3799
https://www.ncbi.nlm.nih.gov/pubmed/22390970
https://doi.org/10.3389/fimmu.2017.01098
https://www.ncbi.nlm.nih.gov/pubmed/21601050
https://doi.org/10.1038/s41598-020-59797-4
https://doi.org/10.4161/viru.22330
https://doi.org/10.1371/journal.pone.0074105
https://www.ncbi.nlm.nih.gov/pubmed/30813403
https://www.ncbi.nlm.nih.gov/pubmed/24149032
https://doi.org/10.1038/srep21722
https://doi.org/10.1126/science.1230835
https://www.ncbi.nlm.nih.gov/pubmed/30813403
https://doi.org/10.1098/rsbl.2018.0860
https://doi.org/10.1038/s41467-019-10495-4
https://repository.asu.edu/items/50946
https://doi.org/10.1126/sciadv.aao0926
https://doi.org/10.1098/rsbl.2018.0860
https://cmr.asm.org/content/29/3/695
https://www.ncbi.nlm.nih.gov/pubmed/22966141
https://doi.org/10.1080/14787210.2019.1635009
https://doi.org/10.1038/s41569-019-0169-2
https://www.ncbi.nlm.nih.gov/pubmed/31131037
http://doi.org/10.1038/nature20117
https://www.ncbi.nlm.nih.gov/pubmed/20388071
https://doi.org/10.1038/s41564-019-0371-3
http://doi.org/10.1038/s41559-019-0913-3
https://www.ncbi.nlm.nih.gov/pubmed/30857374
https://doi.org/10.1016/j.socscimed.2017.12.028
https://www.ceson.org/vespertilio/16/249_270_Riccucci.pdf
https://www.ceson.org/vespertilio/17/161_169_Riccucci.pdf
https://doi.org/10.1007/s00442-002-1081-7
https://doi.org/10.1017/S0266467411000666
https://www.ncbi.nlm.nih.gov/pubmed/23962925
https://doi.org/10.3389/fimmu.2012.00174
https://doi.org/10.3389/fimmu.2018.02171
https://www.ncbi.nlm.nih.gov/pubmed/29387942
https://www.ncbi.nlm.nih.gov/pubmed/30964051
https://www.ncbi.nlm.nih.gov/pubmed/21524339
https://www.ncbi.nlm.nih.gov/pubmed/20840865

Image Sources:
https://commons.wikimedia.org/wiki/File:Bracken_Bat_Cave_evening_of_17_June_2017.ogv
https://commons.wikimedia.org/wiki/File:STING_4EMU.jpg
https://commons.wikimedia.org/wiki/File:CSIRO_ScienceImage_1718_The_Hendra_Virus.jpg
https://commons.wikimedia.org/wiki/File:Coronaviruses_004_lores.jpg
https://commons.wikimedia.org/wiki/File:MERS-CoV_electron_micrograph3.jpg
https://commons.wikimedia.org/wiki/File:Bat_with_White-nose_Syndrome_(6847107816).jpg
https://commons.wikimedia.org/wiki/File:Brandt%27s_bat_(Myotis_brandtii).jpg
https://commons.wikimedia.org/wiki/File:Ebola_Virus_-_Electron_Micrograph.tiff
https://tinyurl.com/urlk4g8