Wondfo false negative?

Jess

Anyone get a negative on a wondfo test & bfp on other brands?

I’ve heard they’re just as sensitive as frer...

When I searched my batch #, it’s all over the net about it being a bad batch. But it’s giving false positives. I’m down to my last test. Had a few positive invalid tests, but no bfps. Wonder if it could work both ways & them not show early?