Final answer:
The coronavirus remains an issue in the US due to inadequate vaccination rates, variants of the virus, and inconsistent public health measures, alongside recognized factors such as reduction of public health personnel, equipment shortages, and mixed policy approaches.
Step-by-step explanation:
The coronavirus is still a major issue in the United States for several reasons, including but not limited to inadequate vaccination rates, the emergence of variants of the virus, and challenges with implementing consistent public health measures. These complications have hampered the containment of the virus and allowed the pandemic to persist. Trevor Garcia identifies a reduction of experts in key positions, inaction leading to equipment shortages, and inconsistent policies as three critical reasons for the pandemic's impact in 2020. Furthermore, other factors including political leadership, international travel, and social behavior have influenced the spread of COVID-19.