If you just need one-off access to a resource, you can always ask your laboratory's APHL member representative (usually the laboratory director) or member-affiliates to download and send you a copy of the materials.
If you need more general access to member-level content, you can have your member representative send a note to [email protected] requesting an "Employee of Member Laboratory" designation be added to your APHL profile. While there may still be some resources entirely restricted to members, this designation will allow access to a wider range of materials.