A Brazilian ad agency has created a poster that stresses the importance of donating blood by depicting a vein that's been turned into a phone charger.

"If you need, we are here. Why not return the favor? We need blood," the ad for Fundacao Pro-Sangue Agencia, a blood donation foundation, reads.

Ad agency Publicis Brasil made the ad and placed it around Sao Paulo, according to its website.

This poster urges Brazilians to donate blood by depicting a vein that's been converted into a phone charger. Ad agency Publicis Brasil made the PSA for Fundacao Pro-Sangue Agencia, a blood donation foundation. (Credit: Rodrigo Guaxupe/Youtube.com)