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SARS-coronaviruses produced in Vero. 6 cell culture, conventional fixation (2.5% GA): (a), (b) REM-microwave embedding; (c), (d) LYNX-embedding; (e), (f) external embedding (Robert Koch Institute, Berlin). Original magnification: (a), (c), (e) 1250×; (b), (d), (f) 10,000×.
