Flag-transitive point-primitive quasi-symmetric $2$-designs with block intersection numbers $0$ and $y\le 10$

In this paper, we show that for a non-trivial quasi-symmetric $2$-design $\mathcal{D}$ with two block intersection numbers $x=0$ and $2\le y\le 10$, if $G\le \mathrm{A}\mathrm{u}\mathrm{t}(\mathcal{D})$ is flag-transitive and point-primitive, then $G$ is either of affine type or almost simple type. Moreover, we prove that the socle of $G$ cannot be an alternating group. If the socle of $G$ is a sporadic group, then $\mathcal{D}$ and $G$ must be one of the following: $\mathcal{D}$ is a $2$-$(12,6,5)$ design with block intersection numbers $0,3$ and $G={\mathrm{M}}_{11}$, or $\mathcal{D}$ is a $2$-$(22,6,5)$ design with block intersection numbers $0,2$ and $G={\mathrm{M}}_{22}$ or ${\mathrm{M}}_{22}:2$.