Can a flu-like disease by asymptomatic and still spread?

Yes.

I have an interest in medical stuff. My sources are from my doctor, and science magazines which cover medical stuff in some articles.

A disease like herpes (Herpes Simplex) is often asymptomatic, that's why it spreads so much. People don’t get symptoms so they don’t bother to get tested. It's not a strong virus, and a normal healthy body deals with it very well. The first infection is the worst, and some people just feel slightly tired and never get any sores at all. Herpes is most communicable when there are open sores.

High blood pressure doesn't have symptoms. You have to measure your blood pressure with a machine. That’s why it’s called the “silent killer”. A person with HBP tends to have more heart attacks and strokes (from blood clots).

In the first 4-7 days of the flu a person is normally asymptomatic, and that's the period a person is MOST communicable by far. So when a person gets symptoms, they can transmit the virus very little. Which makes lockdowns ridiculous and anti-science.

So yes it is possible to be asymptomatic and still spread one of the many viruses that cause flu-like symptoms. The Coronavirus group is just one GROUP of viruses that cause flu, and colds.

In fact the problem with flu and cold viruses is they mutate so fast, the Powers What Is have to make a new traditional vaccine every year. Also the cold mutates so fast it is not feasible from a business perspective to make a traditional vaccine with weak or dead virus. The vaccine would work for a very small part of the population through sheer random chance. And you can only put 4-5 virus variants in a traditional vaccine.