An effort to collect convalescent plasma is set for Tuesday in Cameron County.

DHR Health, Cameron County, and the city of Brownsville are asking those who've tested positive for COVID-19 for their help.

Potential plasma donors must have had a nasal swab test and have been symptom free for 28 days to donate.

The plasma is used to treat patients showing severe or life-threatening symptoms.

To donate and schedule an appointment, call 956-215-3166 or 956-362-2390.