The kit is for the qualitative detection of COVID-19 IgM/IgG antibodies in human serum, plasma and whole blood samples. It is for use by healthcare workers. And we are the only manufacture in china who got the CE for 19 self use test of saliva, can smoothly sell in whole europe 28countries.We are now exportsa large number kitstoGermany,you can see our product in the store. We are developing customers in other countries, we will provide you with the best service, sincerely look forward to cooperatingwith you.