  We prove some results concerning the WORTH property and the Garc\'{i}a-Falset
coefficient of absolute sums of infinitely many Banach spaces. The Opial
property/uniform Opial property of infinite $\ell^p$-sums is also studied and
some properties analogous to the Opial property/uniform Opial property for
Lebesgue-Bochner spaces $L^p(\mu,X)$ are discussed.
