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IEM of EV detected in oropharyngeal swabs of intravenously infected macaques. Oral swabs were collected three days post-exposure (A–C,G) or cell culture (D–F) with monkeypox virus prepared and stained with antibody against EV (A–E,G) or MV (F) for IEM. Cell cultures of monkeypox virus were either prepared with (D,E) or without (F) purification. Measurements of individual virions are given for (B). For (A–D,G), scale bars are 100 nM; 500 nM for (E,F).
