When asked why some people develop symptoms and others don't, one doctor said there are several theories, including genetics and pre-pandemic exposure.
A study has found that more than half of those infected with COVID-19 omicron variant had no idea they contracted the virus."Their antibody levels went up signaling that in fact around some early time period their immune system had seen the actual virus enough to actual mount a response. Developed antibodies to the actual core part of the virus indicating they actually were infected at that time. They just didn't know it," said Dr.
"We started to see that second antibody level actually really start to go up in a lot more people. That was the omicron surge. We started to see the antibody that really goes up as a sign that your immune system has seen the natural virus that really started to take off across many of our study participants during that late December, late January, February period," said Dr. Cheng.
Your level of natural immunity could also be correlated to the level of infection you were exposed to. Dr. Chaz Langelier, Infectious diseases scientist at UCSF
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