Yes, I've heard this news, and this happened just moments after Trump was inaugurated as US president. What I know is that Trump made this decision because he was disappointed with the WHO, which he considered failing to tackle the Covid pandemic. This withdrawal of support will probably have an impact on world health management because the US is the largest donor to WHO (hopefully not). Will African countries get other donors? maybe, but it won't be as big as the US.
We all know that the US is the shadow and biggest support system of the World Health Organization(WHO). Earlier this year,President Trump officially signed and disapproved the US from funding and catering for the needs of the WHO organization because he sensed some lapses in their role of responsibility and accountability.
Also forgetting that this disapproval has severe implications to the global healthcare services and it has also tarnished the US's roles to maintain adequate influence in shaping world global health.