Now that you are fully vaccinated with two shots of the Moderna or Pfizer COVID-19 vaccines-or will be soon-or a single jab of Johnson & Johnson, you can breathe a sigh of relief-for the time being, at least.
Since the start of the pandemic, some researchers have speculated that in years to come, the world may deal with COVID-19 by repeating shots every year or so.
"It is extremely important to suppress the pool of people that can be susceptible to the virus", he said.
While time will tell if additional doses are needed and how regularly, such boosters might not be needed as often as the annual flu shot, said Joseph Eisenberg, a University of MI expert in global diseases.
"A likely scenario is that there will be likely a need for a third dose, somewhere between six and 12 months and then from there, there will be an annual revaccination, but all of that needs to be confirmed".
Speaking to CNBC in an interview aired on Thursday, he said: We need to see what would be the sequence, and for how often we need to do that, that remains to be seen.
New virus variants could weaken that immunity, even though the shot has proven effective against the most common new COVID-19 strain, the so-called "U.K. variant", in recent studies. Until we have more data, which requires more time, we won't know.
"We believe especially people at high risk should get a boost in the fall, and we want to make sure we have the best possible boost", Bancel said.
"They save human lives, they allow economies to reopen, but we sell them at the price of a meal", he was quoted as saying.
He continued: "If you see the data for Europe, I think it's not behind other major complex countries". Among the more than 44,000 clinical trial members, 927 were diagnosed with COVID-19.
Of 77 million people vaccinated in the United States, there have been 5,800 such breakthrough infections, Walensky said, including 396 people who required hospitalization and 74 who died.
The Joint Committee on Vaccination and Immunisation (JCVI) said around 90,000 pregnant women had been vaccinated in the United States, mainly with the two American vaccines, without any safety concerns being raised. Research has shown that people who get vaccinated have more antibodies than those who were naturally infected.