rosol drops containing virus touch LN, they will vitrify and contaminate the LN. Four possible scenarios may be possible: (1) vitrified drops can contaminate sperm, oocytes, or embryos which are cryopreserved by open system vitrification, and also, the virus could be transferred to the patient following warming; (2) it can cross-contaminate samples with ACE-2 receptor such as ovarian and testis tissues [3, 4]; (3) it may contaminate the operator upon warming; and (4) it may not cause any c