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. 2021 Nov 30;12:765890. doi: 10.3389/fimmu.2021.765890

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Copyright © 2021 Verma, Singh, Varshney, Chandru, Acharya, Rajput, Sangwan, Tiwari, Bhowmick and Tiwari

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Infectious keratitis caused by different agents: (A) Bacterial keratitis (B) Fungal keratitis (C) Herpes necrotizing stromal keratitis (D) Early Acanthamoeba keratitis (E) Late Acanthamoeba keratitis. Adopted from https://www.intechopen.com/chapters/69696 under Creative Commons Attribution 3.0 License.