What is the difference between F0 infected with Omicron and F0 infected with Delta?

The following article by Dr. Sanjaya Senanayake, Associate Professor of Medicine, Doctor of Infectious Diseases at the Australian National University will help you get the answer.

Possibility of infection

The basic infectivity coefficient (R0) is a measure of the infectivity of the virus. R0 is the average number of people infected by one person SARS-CoV-2 transmit the virus in the absence of immunity or preventive measures.

The Danish researchers estimate that Omicron’s R0 is 3.19 times higher than that of Delta. Delta has an average R0 of 5 (ranging from 3.2 to 8).

Similarly, the Japanese study concluded that Omicron is 4.2 times more infectious than Delta.

Thus, in a susceptible population (unvaccinated and uninfected), an average person infected with Delta will infect 5 other people, while a person infected with Omicron can transmit the virus to about 20 others.

This makes Omicron one of the most infectious variants known.

Another indicator of the virus’s transmissibility is the extent to which it spreads within households. This is called the secondary attack rate.

Studies from many countries have consistently shown that Omicron has a higher rate of secondary attacks in the household than Delta. In a household where someone is infected with Omicron, the remaining members have a 14-50% chance of being infected.

Why are Omicrons more infectious?

Omicron’s diverse mutations allow it to avoid the immunity created by previous infections and vaccinations.

Studies also show that Omicron infects and multiplies in the upper respiratory tract 70 times faster than Delta.

Why are Omicrons more infectious?

Omicron’s diverse mutations allow it to avoid the immunity created by previous infections and vaccinations.

Omicron’s incubation period – the time from infection with the virus to the onset of symptoms – is about three days. People are usually contagious a day or two before symptoms appear. The incubation period of Omicron is shorter than that of Delta and earlier variants.

In addition, the average time Omicron infected people get sick is shorter than Delta. This number for Omicron is 5 days and for Delta is 6 days.

What is the difference between Omicron and Delta symptoms?

The five most common symptoms of Delta and Omicron are:

– snivel

– headache

– tired

– sneezing

– sore throat.

Compared to Delta, Omicron is more likely to cause a sore throat and less likely to cause loss of taste or smell.

In children, Omicron may be more likely to cause acute inflammation of the upper and lower respiratory tract than other variants, leading to a distinctive cough.

Does Omicron cause less severe illness than Delta?

It’s correct, Omicron less severe disease than Delta. Part of the reason may be that Omicrons are less likely to infect the lungs as it mainly infects the upper respiratory tract.

Omicron’s risk of hospitalization and ICU (intensive care unit) admission is 40-80% lower than Delta’s. Omicron’s risk of death is about 60% lower than Delta’s.

Studies also show that Omicron infects and multiplies in the upper respiratory tract 70 times faster than Delta.

However, the wave of Omicron cases in many countries is associated with increased hospitalization rates because of the increased number of people with COVID-19.

But the good news is that the wave of Omicron cases in many countries peaked within weeks, with hospitalizations and infections rapidly falling.

Can you get reinfected with COVID-19?

Yes, people who have had previous variants are still at risk for Omicron infection, especially in areas with low vaccination rates.

A study analyzing 116,683 cases during the UK’s early Omicron wave found that 9.5% of Omicron infections were reinfection. COVID-19.

In addition, it is too early to draw conclusions about the risk of double Omicron variant reinfection.

How effective are two doses of the vaccine?

After 20 weeks (about 5 months), two doses of the mRNA vaccine (Pfizer or Moderna) provide only about 10% protection against Omicron infection.

After 20 weeks, two doses of AstraZeneca were essentially no longer protective against Omicron infection.

However, two doses of the vaccine still prevent serious illness, with the vaccine effective against hospital admissions due to Omicrons up to 35% for six months after injection. The two doses of the vaccine were more than twice as effective against Delta’s hospitalizations as that of Omicron.

How effective are three doses of the vaccine?

A booster dose of vaccine improves protection against Omicron. At least 10 weeks after the booster dose, the vaccine’s effectiveness against hospitalization was 83%.

Protection against symptomatic disease is also increased. Vaccine efficacy is 65-75% two to four weeks after the booster dose, decreasing to 45-50% within 10 weeks after the booster.

Pfizer and Moderna have also developed an Omicron-specific vaccine that they are about to test in clinical trials and will likely be on the market in the second half of 2022.

According to Cultural Sports