Dear Distributors,

We would like to express our gratitude to you for your trust and support of our products. It's a pleasure working with you.

Due to the adjustment of our marketing strategy, we have decided to stop selling Anti-SARS-CoV-2 Neutralizing Antibody Titer Serologic Assay Kits (Cat. No. RAS-N040, TAS-K022, RAS-N022, RAS-N034, RAS-N031, RAS-N028, and RAS-N041) in the United States and Germany. The products above sold in other countries.

We regret to inform you that, as our distributor,you also need to discontinue the sale of the products above in the United States and Germany. We would like to apologize for any inconvenience this may cause. We sincerely look forward to continuing working with you.

Should you have any further questions, please feel free to contact us.

Kind regards,

ACROBiosystems

Nov.12^th, 2021