Covid is making headlines again with two new variants spreading across the U.S. — “Nimbus” and “Stratus.” Both bring unpleasant symptoms, but Stratus is especially worrying because it evades the immune system more effectively.

Nimbus, first spotted in China, spreads quickly and is known for its painful sore throat. Patients describe it as feeling like “razor blades” when they swallow. Other common symptoms include fatigue, cough, runny nose, fever, and body aches. While usually not severe, experts warn it can still be dangerous for older adults or those with health issues.

Stratus, detected in Southeast Asia, has now spread to dozens of countries. It often causes fatigue, dry cough, chest tightness, headaches, and sometimes brain fog. Doctors say its ability to slip past the immune system may make it harder to fight, especially for the unvaccinated. “Concern should lead to preparedness, but not panic,” one expert advised.

Health officials stress the importance of staying alert. Even mild infections can lead to long Covid. As one doctor warned, “You’re not completely out of the woods after the first infection.” Should we be doing more to prepare for another Covid surge?