By David Lim

The mixed results came on the same day that the United States announced it had found its first Covid-19 cases linked to the South African variant.

The decision cuts scientists at the Food and Drug Administration out of the process.

The decision cuts scientists at the Food and Drug Administration out of the process.

The decision cuts scientists at the Food and Drug Administration out of the process.

The federal government has held back doses equal to the amount it has shipped out, to ensure that everyone who is vaccinated completes the recommended two-shot sequence.

Accurate testing for the House and Senate took on even greater importance after waves of maskless pro-Trump rioters breached the Capitol building.

The federal government has held back doses equal to the amount it has shipped out, to ensure that everyone who is vaccinated completes the recommended two-shot sequence.

The federal government has held back doses equal to the amount it has shipped out, to ensure that everyone who is vaccinated completes the recommended two-shot sequence.

Accurate testing for the House and Senate took on even greater importance after waves of maskless pro-Trump rioters breached the Capitol building.

Accurate testing for the House and Senate took on even greater importance after waves of maskless pro-Trump rioters breached the Capitol building.

The federal government has held back doses equal to the amount it has shipped out, to ensure that everyone who is vaccinated completes the recommended two-shot sequence.

The federal government has held back doses equal to the amount it has shipped out, to ensure that everyone who is vaccinated completes the recommended two-shot sequence.

Accurate testing for the House and Senate took on even greater importance after waves of maskless pro-Trump rioters breached the Capitol building.

Accurate testing for the House and Senate took on even greater importance after waves of maskless pro-Trump rioters breached the Capitol building.

The federal government has held back doses equal to the amount it has shipped out, to ensure that everyone who is vaccinated completes the recommended two-shot sequence.

The federal government has held back doses equal to the amount it has shipped out, to ensure that everyone who is vaccinated completes the recommended two-shot sequence.

Accurate testing for the House and Senate took on even greater importance after waves of maskless pro-Trump rioters breached the Capitol building.

Accurate testing for the House and Senate took on even greater importance after waves of maskless pro-Trump rioters breached the Capitol building.

The 20 millionth case comes less than two months after the country tallied its 10 millionth.

The 20 millionth case comes less than two months after the country tallied its 10 millionth.

The 20 millionth case comes less than two months after the country tallied its 10 millionth.

The 20 millionth case comes less than two months after the country tallied its 10 millionth.

The 20 millionth case comes less than two months after the country tallied its 10 millionth.

The FDA is expected to authorize additional over-the-counter Covid-19 tests in the coming weeks that could bolster supply.

The nation’s testing capacity has increased, but not fast enough to keep pace with the swarm of new cases.

The nation’s testing capacity has increased, but not fast enough to keep pace with the swarm of new cases.

The nation’s testing capacity has increased, but not fast enough to keep pace with the swarm of new cases.

The nation’s testing capacity has increased, but not fast enough to keep pace with the swarm of new cases.

The nation’s testing capacity has increased, but not fast enough to keep pace with the swarm of new cases.

The nation’s testing capacity has increased, but not fast enough to keep pace with the swarm of new cases.