USCIS has issued guidance on what public benefits trigger public charge grounds of inadmissibility. 

USCIS stated that the following benefits trigger public charge consideration:

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WASHINGTON, D.C. - The Department of Health and Human Services (HHS) Centers for Disease Control and Prevention (CDC) has issued a final rule removing HIV from the definiion of communicable disease of public health significance...

USCIS.gov - USCIS issues guidance on the public charge ground of inadmissibility.  

The agency clarifies that non-cash benefits and special-purpose cash benefits that are not intended for income maintenance are not subject...

From USCIS.gov - USCIS revised Form I-601, Application for Waiver of Grounds of Inadmissibility.

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USCIS Update: USCIS Revises Form I-601, Application for Waiver

USCIS has revised Form I-601, Application for Waiver of...