Winnie Byanyima, head of UNAIDS, warns that new HIV infections could increase significantly if US funding for HIV and AIDS programs is cut. She highlights the potential for millions of deaths and the emergence of resistant strains, citing a drastic impact on African countries. Byanyima urges the Trump administration to reconsider its funding freeze, which has already led to layoffs of health workers and increased panic in affected regions. She emphasizes the critical role of US funding in global HIV efforts and the lack of alternative support from other countries.