  For $n\geq 1$, we exhibit a lower bound for the volume of a unit vector field
on $\mathbb{S}^{2n+1}\backslash\{\pm p\}$ depending on the absolute values of
its Poincar\'e indices around $\pm p$. We determine which vector fields achieve
this volume, and discuss the idea of having multiple isolated singularities of
arbitrary configurations.
