 PORTLAND, Maine, Aug. 24, 2021 GLOBE NEWSWIRE -- ImmuCell Corporation Nasdaq: ICCC ImmuCell or the Company, a growing animal health company that develops, manufactures and markets scientifically-proven and practical products that improve the health and productivity of dairy and beef cattle, today announced that the FDA has issued a Technical Section Incomplete Letter covering the Chemistry, Manufacturing and Controls CMC Technical Section for Re-Tain Nisin A intramammary solution. 