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The quantum van der Waals (QvdW) extension of the ideal hadron resonance gas(HRG) model which includes the attractive and repulsive interactions betweenbaryons -- the QvdW-HRG model -- is applied to study the behavior of the baryonnumber related susceptibilities in the crossover temperature region. Inclusionof the QvdW interactions leads to a qualitatively different behavior ofsusceptibilities, in many cases resembling lattice QCD simulations. It is shownthat for some observables, in particular for $\chi_{11}^{BQ} / \chi_2^B$,effects of the QvdW interactions essentially cancel out. It is found that theinclusion of the finite resonance widths leads to an improved description of$\chi_2^B$, but it also leads to a worse description of $\chi_{11}^{BQ} /\chi_2^B$, as compared to the lattice data. On the other hand, inclusion of theextra, unconfirmed baryons into the hadron list leads to a simultaneousimprovement in the description of both observables.

van der Waals Interactions and Hadron Resonance Gas: Role of resonance widths modeling on conserved charges fluctuations