U.S. intelligence agencies issued warnings about the novel coronavirus in more than a dozen classified briefings prepared for President Trump in January and February, months during which he continued to play down the threat, according to current and former U.S. officials.

The repeated warnings were conveyed in issues of the President’s Daily Brief, a sensitive report that is produced before dawn each day and designed to call the president’s attention to the most significant global developments and security threats.

For weeks, the PDB — as the report is known — traced the virus’s spread around the globe, made clear that China was suppressing information about the contagion’s transmissibility and lethal toll, and raised the prospect of dire political and economic consequences.

But the alarms appear to have failed to register with the president, who routinely skips reading the PDB and has at times shown little patience for even the oral summary he takes two or three times per week, according to the officials, who spoke on the condition of anonymity to discuss classified material.