Novavax's vaccine has a few disadvantages and a few advantages over the vaccines currently being used in the United States and Europe. The Novavax vaccine is more expensive than the other vaccines. The company has promised to scale costs to the economic level of countries that purchase their vaccine. Given the different levels of wealth and poverty between countries and within countries and given different systems of public health care programs cost may still be a factor in terms of vaccine choices.
Novavax's adjuvant is a saponin from the Chilean soapbox tree. How much this resource can bear is still an open question (
back story). Despite forest conservation laws that date back as far as the 1870s, Chile has decimated much of its native forests over the last century and a half. Since the mid-1970s the nation has replaced many of these forests with tree plantations (
Chilean forestry policy). This may or may not be the fate of the Chilean soapbox tree. To put it more bluntly can the natural resource be sustained in view of the huge demand?
Another disadvantage for Novavax is that by the time that it reaches the market in the United States it is likely that somewhere between 70 to 80 percent of the United States population will have already been vaccinated. Much of the rest of the world will not be vaccinated, though, for quite a while longer. Investors, however, may look somewhat myopically at this and avoid investing in the company given how far it is behind its competitors in the United States.
Novavax does have several advantages over the mRNA vaccines. The first one which requires little explanation is that it can be stored in a refrigerator rather than having to be kept in extremely cold storage.
Another major advantage is that the vaccine seems quite effective against several variants (although it has not been tested against the Delta variant). It is also likely a safer vaccine than both the adenovirus vaccines from Johnson & Johnson (
JNJ) and AstraZeneca (
AZN), for instance, and the mRNA vaccines such as from Pfizer (
PFE) and Moderna (
MRNA). One reason for this is that the saponin adjuvant reduces the amount of spike protein that needs to be present to provide sufficient immunity against the coronavirus. Johnson & Johnson and AstraZeneca are working on trying to make their vaccines safer particularly by reducing the rare cases of serious and sometimes fatal blood clots (
effort). Unfortunately, Pfizer and Moderna have declined to take part in this endeavor because they feel it would
tarnish the reputation of their vaccines (even though the
risk for clotting is present for all these vaccines: about one in every one hundred thousand first shots, with a
mortality rate of about
20 percent).